/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:19:58,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:19:58,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:19:58,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:19:58,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 14:19:58,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 14:19:58,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 14:19:58,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 14:19:58,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 14:19:58,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 14:19:58,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 14:19:58,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 14:19:58,339 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 14:19:58,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 14:19:58,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 14:19:58,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 14:19:58,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 14:19:58,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 14:19:58,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:19:58,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:19:58,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:19:58,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:19:58,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:19:58,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:19:58,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:19:58,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:19:58,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:19:58,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:19:58,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:19:58,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:19:58,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:19:58,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:19:58,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:19:58,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:19:58,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:19:58,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:19:58,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:19:58,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:19:58,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:19:58,365 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:19:58,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:19:58,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:19:58,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:19:58,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:19:58,561 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:19:58,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-04-06 14:19:58,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b52c4e6/9a384e55ebd74d1b8abddb4e2a030788/FLAGde88d610a [2022-04-06 14:19:58,979 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:19:58,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-04-06 14:19:58,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b52c4e6/9a384e55ebd74d1b8abddb4e2a030788/FLAGde88d610a [2022-04-06 14:19:58,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b52c4e6/9a384e55ebd74d1b8abddb4e2a030788 [2022-04-06 14:19:58,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:19:58,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:19:59,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:19:59,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:19:59,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:19:59,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:19:58" (1/1) ... [2022-04-06 14:19:59,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e119fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59, skipping insertion in model container [2022-04-06 14:19:59,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:19:58" (1/1) ... [2022-04-06 14:19:59,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:19:59,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:19:59,164 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-04-06 14:19:59,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:19:59,200 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:19:59,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-04-06 14:19:59,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:19:59,237 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:19:59,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59 WrapperNode [2022-04-06 14:19:59,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:19:59,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:19:59,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:19:59,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:19:59,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:19:59,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:19:59,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:19:59,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:19:59,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:19:59,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:59,345 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) [2022-04-06 14:19:59,418 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 [2022-04-06 14:19:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:19:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:19:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:19:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:19:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:19:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:19:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:19:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:19:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:19:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:19:59,497 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:19:59,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:19:59,613 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:19:59,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:19:59,617 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 14:19:59,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:19:59 BoogieIcfgContainer [2022-04-06 14:19:59,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:19:59,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:19:59,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:19:59,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:19:59,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:19:58" (1/3) ... [2022-04-06 14:19:59,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712b401b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:19:59, skipping insertion in model container [2022-04-06 14:19:59,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (2/3) ... [2022-04-06 14:19:59,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712b401b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:19:59, skipping insertion in model container [2022-04-06 14:19:59,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:19:59" (3/3) ... [2022-04-06 14:19:59,623 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-04-06 14:19:59,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:19:59,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:19:59,652 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:19:59,657 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 14:19:59,657 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:19:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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) [2022-04-06 14:19:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 14:19:59,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:59,670 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:59,671 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-04-06 14:19:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:59,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1160375022] [2022-04-06 14:19:59,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:19:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 2 times [2022-04-06 14:19:59,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955876407] [2022-04-06 14:19:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:19:59,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:59,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955876407] [2022-04-06 14:19:59,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955876407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:59,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:59,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:19:59,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:59,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1160375022] [2022-04-06 14:19:59,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1160375022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:59,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:59,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:19:59,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914475938] [2022-04-06 14:19:59,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:59,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:19:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:19:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:19:59,864 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-04-06 14:19:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:19:59,911 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-04-06 14:19:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:19:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2022-04-06 14:19:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:19:59,917 INFO L225 Difference]: With dead ends: 64 [2022-04-06 14:19:59,917 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 14:19:59,919 INFO L912 BasicCegarLoop]: 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 [2022-04-06 14:19:59,923 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:19:59,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:19:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 14:19:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 14:19:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:19:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-04-06 14:19:59,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-04-06 14:19:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:19:59,954 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-04-06 14:19:59,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-04-06 14:19:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-04-06 14:19:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 14:19:59,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:59,956 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:19:59,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:19:59,956 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-04-06 14:19:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:59,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312310216] [2022-04-06 14:19:59,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:19:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 2 times [2022-04-06 14:19:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:59,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29889925] [2022-04-06 14:19:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:20:00,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:00,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29889925] [2022-04-06 14:20:00,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29889925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:20:00,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312310216] [2022-04-06 14:20:00,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312310216] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:20:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170710484] [2022-04-06 14:20:00,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:00,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:20:00,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:20:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:20:00,088 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-04-06 14:20:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:00,174 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-04-06 14:20:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:20:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 19 [2022-04-06 14:20:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:00,176 INFO L225 Difference]: With dead ends: 65 [2022-04-06 14:20:00,176 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 14:20:00,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:20:00,177 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:00,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 14:20:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-04-06 14:20:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-04-06 14:20:00,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-04-06 14:20:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:00,184 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-04-06 14:20:00,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-04-06 14:20:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-04-06 14:20:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 14:20:00,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:00,184 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:00,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:20:00,185 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-04-06 14:20:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637661973] [2022-04-06 14:20:00,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:00,209 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:00,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 2 times [2022-04-06 14:20:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:00,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336455382] [2022-04-06 14:20:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:20:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336455382] [2022-04-06 14:20:00,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336455382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641539231] [2022-04-06 14:20:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:00,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:00,274 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) [2022-04-06 14:20:00,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:20:00,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 14:20:00,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:20:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:20:00,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:20:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641539231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:20:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-04-06 14:20:00,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:00,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637661973] [2022-04-06 14:20:00,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637661973] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:20:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646772202] [2022-04-06 14:20:00,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:00,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:20:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:20:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:20:00,409 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:00,434 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-06 14:20:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:20:00,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 21 [2022-04-06 14:20:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:00,436 INFO L225 Difference]: With dead ends: 54 [2022-04-06 14:20:00,436 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 14:20:00,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:20:00,437 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:00,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 148 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 14:20:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-04-06 14:20:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-04-06 14:20:00,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-04-06 14:20:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:00,444 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-04-06 14:20:00,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-04-06 14:20:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 14:20:00,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:00,445 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:00,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:00,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:00,664 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2022-04-06 14:20:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2124455113] [2022-04-06 14:20:00,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:00,666 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:00,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 2 times [2022-04-06 14:20:00,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:00,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423449710] [2022-04-06 14:20:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:00,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:20:00,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423449710] [2022-04-06 14:20:00,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423449710] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:00,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966143383] [2022-04-06 14:20:00,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:00,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:00,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:00,771 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) [2022-04-06 14:20:00,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:20:00,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:00,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:20:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:20:00,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:20:00,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966143383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:20:00,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-04-06 14:20:00,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:00,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2124455113] [2022-04-06 14:20:00,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2124455113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:20:00,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055106185] [2022-04-06 14:20:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:00,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:20:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:20:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:20:00,912 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:00,943 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-04-06 14:20:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:20:00,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 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 27 [2022-04-06 14:20:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:00,945 INFO L225 Difference]: With dead ends: 99 [2022-04-06 14:20:00,945 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 14:20:00,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:20:00,946 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:00,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 14:20:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-04-06 14:20:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-04-06 14:20:00,952 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-04-06 14:20:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:00,953 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-04-06 14:20:00,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-04-06 14:20:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 14:20:00,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:00,953 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:00,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 14:20:01,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 14:20:01,170 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2022-04-06 14:20:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:01,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477228709] [2022-04-06 14:20:01,172 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:01,172 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:01,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 2 times [2022-04-06 14:20:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215904201] [2022-04-06 14:20:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:01,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:20:01,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215904201] [2022-04-06 14:20:01,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215904201] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378665915] [2022-04-06 14:20:01,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:01,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:01,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:01,278 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) [2022-04-06 14:20:01,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:20:01,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:01,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:01,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:20:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:01,639 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:01,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2022-04-06 14:20:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:20:01,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378665915] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:01,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:20:01,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 17 [2022-04-06 14:20:01,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477228709] [2022-04-06 14:20:01,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477228709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:01,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:01,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:01,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025354937] [2022-04-06 14:20:01,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:01,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:01,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:20:01,669 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:01,763 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-04-06 14:20:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:01,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 28 [2022-04-06 14:20:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:01,764 INFO L225 Difference]: With dead ends: 66 [2022-04-06 14:20:01,764 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 14:20:01,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:20:01,765 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:01,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 14:20:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 14:20:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-04-06 14:20:01,770 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-04-06 14:20:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:01,770 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-04-06 14:20:01,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-04-06 14:20:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 14:20:01,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:01,771 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:01,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 14:20:01,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:01,987 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2022-04-06 14:20:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [514200438] [2022-04-06 14:20:01,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:01,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:01,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 2 times [2022-04-06 14:20:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52459225] [2022-04-06 14:20:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:01,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:02,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52459225] [2022-04-06 14:20:02,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52459225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298686259] [2022-04-06 14:20:02,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:02,086 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) [2022-04-06 14:20:02,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:20:02,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:02,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:02,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:02,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:20:02,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:02,379 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:02,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:20:02,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298686259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:02,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:02,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-04-06 14:20:02,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:02,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [514200438] [2022-04-06 14:20:02,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [514200438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:02,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:02,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:20:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199631348] [2022-04-06 14:20:02,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:02,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:20:02,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:20:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:20:02,410 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-04-06 14:20:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:02,500 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-04-06 14:20:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:20:02,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 29 [2022-04-06 14:20:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:02,501 INFO L225 Difference]: With dead ends: 130 [2022-04-06 14:20:02,501 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 14:20:02,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:20:02,502 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:02,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 14:20:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-04-06 14:20:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-04-06 14:20:02,510 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-04-06 14:20:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:02,510 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-04-06 14:20:02,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-04-06 14:20:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-04-06 14:20:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:20:02,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:02,511 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:02,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:02,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:02,744 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 3 times [2022-04-06 14:20:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425765574] [2022-04-06 14:20:02,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:02,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:02,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 4 times [2022-04-06 14:20:02,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492851280] [2022-04-06 14:20:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:02,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:02,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:02,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:02,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492851280] [2022-04-06 14:20:02,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492851280] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:02,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761411967] [2022-04-06 14:20:02,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:02,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:02,837 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) [2022-04-06 14:20:02,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:20:02,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:03,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:03,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:03,161 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:03,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:03,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761411967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:03,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:03,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2022-04-06 14:20:03,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:03,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425765574] [2022-04-06 14:20:03,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425765574] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:03,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:03,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:20:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853523999] [2022-04-06 14:20:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:03,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:20:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:20:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:20:03,195 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-04-06 14:20:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:03,321 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2022-04-06 14:20:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:20:03,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 31 [2022-04-06 14:20:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:03,323 INFO L225 Difference]: With dead ends: 157 [2022-04-06 14:20:03,323 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 14:20:03,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:20:03,324 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 129 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:03,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 56 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 14:20:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 48. [2022-04-06 14:20:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-04-06 14:20:03,332 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 31 [2022-04-06 14:20:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:03,333 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-04-06 14:20:03,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-04-06 14:20:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-04-06 14:20:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 14:20:03,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:03,333 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:03,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:03,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:03,549 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 5 times [2022-04-06 14:20:03,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2144469116] [2022-04-06 14:20:03,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:03,551 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:03,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 6 times [2022-04-06 14:20:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519312576] [2022-04-06 14:20:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:03,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:03,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519312576] [2022-04-06 14:20:03,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519312576] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:03,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047944210] [2022-04-06 14:20:03,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:03,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:03,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:03,631 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) [2022-04-06 14:20:03,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:20:03,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:03,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 14:20:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:03,974 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:03,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 14:20:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047944210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:04,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:04,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-04-06 14:20:04,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2144469116] [2022-04-06 14:20:04,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2144469116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:04,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:04,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:04,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329834459] [2022-04-06 14:20:04,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:04,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:20:04,022 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-04-06 14:20:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:04,280 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2022-04-06 14:20:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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 33 [2022-04-06 14:20:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:04,282 INFO L225 Difference]: With dead ends: 184 [2022-04-06 14:20:04,282 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 14:20:04,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:20:04,282 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 177 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:04,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 68 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 14:20:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 50. [2022-04-06 14:20:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 14:20:04,300 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 33 [2022-04-06 14:20:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:04,300 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 14:20:04,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-04-06 14:20:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 14:20:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 14:20:04,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:04,301 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:04,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:04,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:04,502 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:04,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 7 times [2022-04-06 14:20:04,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:04,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46070769] [2022-04-06 14:20:04,504 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:04,504 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:04,504 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 8 times [2022-04-06 14:20:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257913204] [2022-04-06 14:20:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:04,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:04,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:04,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257913204] [2022-04-06 14:20:04,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257913204] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:04,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272985694] [2022-04-06 14:20:04,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:04,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:04,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:04,573 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) [2022-04-06 14:20:04,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:20:04,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:04,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:04,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 14:20:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:04,877 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:04,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 14:20:04,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272985694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:04,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-04-06 14:20:04,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:04,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46070769] [2022-04-06 14:20:04,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46070769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:04,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089464971] [2022-04-06 14:20:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:04,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:20:04,914 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2022-04-06 14:20:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:05,185 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-04-06 14:20:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 35 [2022-04-06 14:20:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:05,187 INFO L225 Difference]: With dead ends: 211 [2022-04-06 14:20:05,187 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 14:20:05,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:20:05,188 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 255 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:05,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 14:20:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 52. [2022-04-06 14:20:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-04-06 14:20:05,197 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 35 [2022-04-06 14:20:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:05,197 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-04-06 14:20:05,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2022-04-06 14:20:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-04-06 14:20:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:20:05,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:05,198 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:05,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 14:20:05,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:05,399 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 9 times [2022-04-06 14:20:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [439043326] [2022-04-06 14:20:05,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:05,401 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:05,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 10 times [2022-04-06 14:20:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:05,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230681862] [2022-04-06 14:20:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:05,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:05,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230681862] [2022-04-06 14:20:05,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230681862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191076537] [2022-04-06 14:20:05,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:05,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:05,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:05,508 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) [2022-04-06 14:20:05,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:20:05,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:05,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:05,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 14:20:05,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:05,892 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:05,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 14:20:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191076537] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:05,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:05,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-04-06 14:20:05,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [439043326] [2022-04-06 14:20:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [439043326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:05,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:05,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:20:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956578791] [2022-04-06 14:20:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:05,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:20:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:20:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:20:05,944 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-04-06 14:20:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:06,326 INFO L93 Difference]: Finished difference Result 238 states and 327 transitions. [2022-04-06 14:20:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:20:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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 37 [2022-04-06 14:20:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:06,327 INFO L225 Difference]: With dead ends: 238 [2022-04-06 14:20:06,327 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 14:20:06,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:20:06,328 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:06,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 102 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 14:20:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 54. [2022-04-06 14:20:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-04-06 14:20:06,338 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2022-04-06 14:20:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:06,338 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-04-06 14:20:06,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-04-06 14:20:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-04-06 14:20:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 14:20:06,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:06,339 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:06,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 14:20:06,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 14:20:06,555 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 11 times [2022-04-06 14:20:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:06,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95490006] [2022-04-06 14:20:06,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:06,557 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:06,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 12 times [2022-04-06 14:20:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562540994] [2022-04-06 14:20:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:06,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:06,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562540994] [2022-04-06 14:20:06,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562540994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:06,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984828172] [2022-04-06 14:20:06,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:06,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:06,698 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) [2022-04-06 14:20:06,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:20:06,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:06,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:06,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:07,076 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:07,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 14:20:07,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984828172] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:07,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:07,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-04-06 14:20:07,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95490006] [2022-04-06 14:20:07,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95490006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:07,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:07,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:20:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826770570] [2022-04-06 14:20:07,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:07,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:20:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:20:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:20:07,125 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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) [2022-04-06 14:20:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:07,577 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-04-06 14:20:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:20:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 39 [2022-04-06 14:20:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:07,579 INFO L225 Difference]: With dead ends: 265 [2022-04-06 14:20:07,579 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 14:20:07,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:07,580 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 336 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:07,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 99 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 14:20:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 56. [2022-04-06 14:20:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-04-06 14:20:07,596 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-04-06 14:20:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:07,597 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-04-06 14:20:07,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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) [2022-04-06 14:20:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-04-06 14:20:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 14:20:07,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:07,599 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:07,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:07,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:07,816 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 13 times [2022-04-06 14:20:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:07,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [852311638] [2022-04-06 14:20:07,817 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:07,817 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:07,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 14 times [2022-04-06 14:20:07,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:07,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397277583] [2022-04-06 14:20:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:07,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397277583] [2022-04-06 14:20:07,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397277583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615735719] [2022-04-06 14:20:07,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:07,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:07,932 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) [2022-04-06 14:20:07,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 14:20:08,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:08,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 14:20:08,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:08,293 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:08,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 14:20:08,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615735719] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:08,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:08,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 23 [2022-04-06 14:20:08,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:08,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [852311638] [2022-04-06 14:20:08,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [852311638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:08,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:08,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867151615] [2022-04-06 14:20:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:08,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:08,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:08,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:08,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-04-06 14:20:08,336 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 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) [2022-04-06 14:20:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:08,898 INFO L93 Difference]: Finished difference Result 292 states and 403 transitions. [2022-04-06 14:20:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:20:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 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 41 [2022-04-06 14:20:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:08,900 INFO L225 Difference]: With dead ends: 292 [2022-04-06 14:20:08,900 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 14:20:08,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:20:08,901 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:08,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:20:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 14:20:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 58. [2022-04-06 14:20:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-04-06 14:20:08,918 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 41 [2022-04-06 14:20:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:08,919 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-04-06 14:20:08,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 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) [2022-04-06 14:20:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-04-06 14:20:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 14:20:08,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:08,924 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:08,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:09,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 14:20:09,124 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 15 times [2022-04-06 14:20:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:09,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809527813] [2022-04-06 14:20:09,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:09,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:09,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 16 times [2022-04-06 14:20:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:09,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554252344] [2022-04-06 14:20:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:09,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:09,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:09,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554252344] [2022-04-06 14:20:09,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554252344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:09,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250815982] [2022-04-06 14:20:09,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:09,266 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) [2022-04-06 14:20:09,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 14:20:09,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:09,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:09,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:09,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 14:20:09,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:09,630 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:09,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 14:20:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250815982] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:09,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:09,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2022-04-06 14:20:09,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809527813] [2022-04-06 14:20:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809527813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:09,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:09,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:20:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946166859] [2022-04-06 14:20:09,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:09,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:20:09,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:20:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:20:09,675 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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) [2022-04-06 14:20:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:10,376 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2022-04-06 14:20:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:20:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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 43 [2022-04-06 14:20:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:10,377 INFO L225 Difference]: With dead ends: 319 [2022-04-06 14:20:10,377 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 14:20:10,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:20:10,378 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 432 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:10,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 123 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:20:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 14:20:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 60. [2022-04-06 14:20:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-04-06 14:20:10,391 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 43 [2022-04-06 14:20:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:10,392 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-04-06 14:20:10,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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) [2022-04-06 14:20:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-04-06 14:20:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 14:20:10,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:10,392 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:10,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:10,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 14:20:10,608 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 17 times [2022-04-06 14:20:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:10,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685753266] [2022-04-06 14:20:10,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:10,610 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:10,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:10,610 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 18 times [2022-04-06 14:20:10,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:10,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855663218] [2022-04-06 14:20:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:10,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:10,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855663218] [2022-04-06 14:20:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855663218] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633340384] [2022-04-06 14:20:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:10,742 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) [2022-04-06 14:20:10,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:20:10,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:10,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 14:20:10,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:11,077 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:11,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 14:20:11,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633340384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:11,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:11,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 24 [2022-04-06 14:20:11,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:11,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685753266] [2022-04-06 14:20:11,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685753266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:11,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:11,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:20:11,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492574332] [2022-04-06 14:20:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:11,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:20:11,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:11,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:20:11,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:20:11,133 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 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) [2022-04-06 14:20:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:11,975 INFO L93 Difference]: Finished difference Result 346 states and 479 transitions. [2022-04-06 14:20:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:20:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 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 45 [2022-04-06 14:20:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:11,976 INFO L225 Difference]: With dead ends: 346 [2022-04-06 14:20:11,976 INFO L226 Difference]: Without dead ends: 311 [2022-04-06 14:20:11,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:20:11,978 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 495 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:11,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 130 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:20:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-04-06 14:20:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 62. [2022-04-06 14:20:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-04-06 14:20:11,993 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 45 [2022-04-06 14:20:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:11,993 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-04-06 14:20:11,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 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) [2022-04-06 14:20:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-04-06 14:20:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 14:20:11,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:11,993 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:12,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:12,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 14:20:12,203 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 19 times [2022-04-06 14:20:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:12,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371103084] [2022-04-06 14:20:12,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:12,206 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:12,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 20 times [2022-04-06 14:20:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352801149] [2022-04-06 14:20:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:12,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:12,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352801149] [2022-04-06 14:20:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352801149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982975558] [2022-04-06 14:20:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:12,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:12,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:12,302 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) [2022-04-06 14:20:12,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 14:20:12,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:20:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:12,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 14:20:12,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:12,605 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:12,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 14:20:12,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982975558] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:12,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:12,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 8] total 18 [2022-04-06 14:20:12,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:12,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371103084] [2022-04-06 14:20:12,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371103084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:12,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:12,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:20:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408255322] [2022-04-06 14:20:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:12,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:20:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:20:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:20:12,647 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-04-06 14:20:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:12,743 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-04-06 14:20:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:20:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 47 [2022-04-06 14:20:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:12,745 INFO L225 Difference]: With dead ends: 115 [2022-04-06 14:20:12,745 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 14:20:12,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:20:12,745 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:12,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 14:20:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-04-06 14:20:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-04-06 14:20:12,768 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2022-04-06 14:20:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:12,768 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-04-06 14:20:12,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-04-06 14:20:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-04-06 14:20:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 14:20:12,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:12,768 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:12,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:12,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 14:20:12,985 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:12,985 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 21 times [2022-04-06 14:20:12,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:12,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924522729] [2022-04-06 14:20:12,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:12,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:12,986 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 22 times [2022-04-06 14:20:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711041779] [2022-04-06 14:20:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:13,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:13,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711041779] [2022-04-06 14:20:13,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711041779] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399245156] [2022-04-06 14:20:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:13,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:13,088 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) [2022-04-06 14:20:13,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 14:20:13,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:13,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:20:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:13,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 14:20:13,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:13,569 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:13,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 14:20:13,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399245156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:13,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:13,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 12] total 26 [2022-04-06 14:20:13,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:13,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924522729] [2022-04-06 14:20:13,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924522729] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:13,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:13,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:20:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291883071] [2022-04-06 14:20:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:13,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:20:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:20:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:20:13,624 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-04-06 14:20:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:13,738 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-04-06 14:20:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:20:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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 50 [2022-04-06 14:20:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:13,739 INFO L225 Difference]: With dead ends: 143 [2022-04-06 14:20:13,739 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 14:20:13,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-04-06 14:20:13,740 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:13,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 14:20:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-04-06 14:20:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-04-06 14:20:13,786 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-04-06 14:20:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:13,786 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-04-06 14:20:13,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 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) [2022-04-06 14:20:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-04-06 14:20:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 14:20:13,786 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:13,786 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:13,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:13,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:13,989 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 23 times [2022-04-06 14:20:13,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630743939] [2022-04-06 14:20:13,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:13,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:13,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 24 times [2022-04-06 14:20:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:13,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278122898] [2022-04-06 14:20:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:13,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:14,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:14,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:14,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278122898] [2022-04-06 14:20:14,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278122898] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808787366] [2022-04-06 14:20:14,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:14,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:14,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:14,088 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) [2022-04-06 14:20:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 14:20:14,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:14,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 14:20:14,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:14,457 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:14,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 14:20:14,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808787366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:14,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:14,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-04-06 14:20:14,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630743939] [2022-04-06 14:20:14,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630743939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:14,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:14,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730498278] [2022-04-06 14:20:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:14,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:14,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:20:14,512 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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) [2022-04-06 14:20:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:14,651 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2022-04-06 14:20:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 53 [2022-04-06 14:20:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:14,652 INFO L225 Difference]: With dead ends: 167 [2022-04-06 14:20:14,652 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 14:20:14,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:20:14,654 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:14,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 14:20:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-04-06 14:20:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-04-06 14:20:14,689 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 53 [2022-04-06 14:20:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:14,689 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-04-06 14:20:14,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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) [2022-04-06 14:20:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-04-06 14:20:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 14:20:14,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:14,690 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:14,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:14,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 14:20:14,904 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:14,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 25 times [2022-04-06 14:20:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:14,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369586306] [2022-04-06 14:20:14,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:14,906 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:14,906 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 26 times [2022-04-06 14:20:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:14,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674870179] [2022-04-06 14:20:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:14,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:14,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674870179] [2022-04-06 14:20:14,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674870179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:14,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459518482] [2022-04-06 14:20:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:14,996 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) [2022-04-06 14:20:15,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 14:20:15,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:15,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:20:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:15,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 14:20:15,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:15,727 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:15,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 14:20:15,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459518482] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:15,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:15,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 28 [2022-04-06 14:20:15,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:15,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369586306] [2022-04-06 14:20:15,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369586306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:15,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:15,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284995493] [2022-04-06 14:20:15,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:15,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:15,775 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-04-06 14:20:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:15,985 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-04-06 14:20:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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 56 [2022-04-06 14:20:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:15,986 INFO L225 Difference]: With dead ends: 191 [2022-04-06 14:20:15,986 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 14:20:15,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:20:15,987 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:15,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 66 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 14:20:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-04-06 14:20:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2660550458715596) internal successors, (138), 109 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-04-06 14:20:16,031 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 56 [2022-04-06 14:20:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:16,031 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-04-06 14:20:16,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-04-06 14:20:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-04-06 14:20:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 14:20:16,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:16,032 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:16,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 14:20:16,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 14:20:16,248 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 27 times [2022-04-06 14:20:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:16,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046554781] [2022-04-06 14:20:16,249 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:16,249 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:16,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 28 times [2022-04-06 14:20:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:16,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349748003] [2022-04-06 14:20:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:16,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:16,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349748003] [2022-04-06 14:20:16,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349748003] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:16,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939512670] [2022-04-06 14:20:16,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:16,365 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) [2022-04-06 14:20:16,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 14:20:16,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:16,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:20:16,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:16,762 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:16,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:20:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939512670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:16,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:16,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-04-06 14:20:16,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046554781] [2022-04-06 14:20:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046554781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:16,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:16,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:20:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376255653] [2022-04-06 14:20:16,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:16,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:20:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:20:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:20:16,808 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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) [2022-04-06 14:20:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:17,046 INFO L93 Difference]: Finished difference Result 215 states and 281 transitions. [2022-04-06 14:20:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:20:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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 59 [2022-04-06 14:20:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:17,047 INFO L225 Difference]: With dead ends: 215 [2022-04-06 14:20:17,047 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 14:20:17,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:20:17,048 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:17,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 75 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 14:20:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-04-06 14:20:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-04-06 14:20:17,093 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 59 [2022-04-06 14:20:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:17,094 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-04-06 14:20:17,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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) [2022-04-06 14:20:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-04-06 14:20:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:20:17,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:17,094 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:17,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 14:20:17,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:17,309 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:17,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 29 times [2022-04-06 14:20:17,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:17,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488272967] [2022-04-06 14:20:17,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:17,311 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:17,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 30 times [2022-04-06 14:20:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462496280] [2022-04-06 14:20:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:17,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462496280] [2022-04-06 14:20:17,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462496280] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796866737] [2022-04-06 14:20:17,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:17,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:17,400 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) [2022-04-06 14:20:17,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 14:20:17,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:17,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:17,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:20:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:17,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 14:20:17,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:17,800 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:17,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 14:20:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796866737] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:17,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:17,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-04-06 14:20:17,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488272967] [2022-04-06 14:20:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488272967] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:17,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:20:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423119660] [2022-04-06 14:20:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:17,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:20:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:20:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:20:17,839 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-04-06 14:20:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:18,092 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2022-04-06 14:20:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:20:18,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 62 [2022-04-06 14:20:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:18,093 INFO L225 Difference]: With dead ends: 239 [2022-04-06 14:20:18,093 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 14:20:18,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:18,094 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 134 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:18,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 64 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 14:20:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-04-06 14:20:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 133 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-04-06 14:20:18,145 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 62 [2022-04-06 14:20:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:18,145 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-04-06 14:20:18,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-04-06 14:20:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-04-06 14:20:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 14:20:18,146 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:18,146 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:18,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:18,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:18,362 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 31 times [2022-04-06 14:20:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111467970] [2022-04-06 14:20:18,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:18,363 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:18,363 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 32 times [2022-04-06 14:20:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:18,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658522699] [2022-04-06 14:20:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:18,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658522699] [2022-04-06 14:20:18,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658522699] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485169080] [2022-04-06 14:20:18,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:18,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:18,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:18,519 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) [2022-04-06 14:20:18,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 14:20:18,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:18,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:20:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:19,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 14:20:19,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:19,425 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:19,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-04-06 14:20:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485169080] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:19,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2022-04-06 14:20:19,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111467970] [2022-04-06 14:20:19,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111467970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:19,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106385302] [2022-04-06 14:20:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:19,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:20:19,477 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-04-06 14:20:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:19,851 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2022-04-06 14:20:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:20:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 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 65 [2022-04-06 14:20:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:19,852 INFO L225 Difference]: With dead ends: 263 [2022-04-06 14:20:19,852 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 14:20:19,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:20:19,853 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 134 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:19,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 88 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 14:20:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-04-06 14:20:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.282758620689655) internal successors, (186), 145 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-04-06 14:20:19,921 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 65 [2022-04-06 14:20:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:19,921 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-04-06 14:20:19,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-04-06 14:20:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-04-06 14:20:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 14:20:19,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:19,922 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:19,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:20,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:20,138 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 33 times [2022-04-06 14:20:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487738735] [2022-04-06 14:20:20,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:20,140 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:20,140 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 34 times [2022-04-06 14:20:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:20,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609139132] [2022-04-06 14:20:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:20,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:20,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 14:20:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609139132] [2022-04-06 14:20:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609139132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555804036] [2022-04-06 14:20:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:20,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:20,378 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) [2022-04-06 14:20:20,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 14:20:20,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:20,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:20:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:20,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 14:20:20,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:20,943 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-04-06 14:20:20,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-04-06 14:20:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 14:20:20,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555804036] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:20,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:20,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 22 [2022-04-06 14:20:20,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487738735] [2022-04-06 14:20:20,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487738735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:20,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:20,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:20:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540194890] [2022-04-06 14:20:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:20,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:20:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:20:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:20:20,985 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-04-06 14:20:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:21,228 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2022-04-06 14:20:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:20:21,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 68 [2022-04-06 14:20:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:21,230 INFO L225 Difference]: With dead ends: 263 [2022-04-06 14:20:21,230 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 14:20:21,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:21,234 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:21,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 46 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 14:20:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 152. [2022-04-06 14:20:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2789115646258504) internal successors, (188), 147 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 192 transitions. [2022-04-06 14:20:21,301 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 192 transitions. Word has length 68 [2022-04-06 14:20:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:21,301 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 192 transitions. [2022-04-06 14:20:21,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-04-06 14:20:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 192 transitions. [2022-04-06 14:20:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 14:20:21,302 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:21,302 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:21,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:21,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 14:20:21,519 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:21,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 1 times [2022-04-06 14:20:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:21,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735694724] [2022-04-06 14:20:21,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:21,520 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:21,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 2 times [2022-04-06 14:20:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347964717] [2022-04-06 14:20:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:21,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:21,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347964717] [2022-04-06 14:20:21,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347964717] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:21,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258651398] [2022-04-06 14:20:21,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:21,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:21,652 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) [2022-04-06 14:20:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 14:20:21,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:20:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-04-06 14:20:22,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:22,416 INFO L356 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2022-04-06 14:20:22,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 49 [2022-04-06 14:20:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 14:20:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258651398] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:22,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:22,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 25 [2022-04-06 14:20:22,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735694724] [2022-04-06 14:20:22,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735694724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:22,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:22,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:20:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494349191] [2022-04-06 14:20:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:22,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:20:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:20:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:20:22,480 INFO L87 Difference]: Start difference. First operand 152 states and 192 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 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) [2022-04-06 14:20:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:22,827 INFO L93 Difference]: Finished difference Result 243 states and 315 transitions. [2022-04-06 14:20:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:20:22,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 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 69 [2022-04-06 14:20:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:22,829 INFO L225 Difference]: With dead ends: 243 [2022-04-06 14:20:22,829 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 14:20:22,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:20:22,829 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 153 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:22,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 101 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 14:20:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2022-04-06 14:20:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 153 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2022-04-06 14:20:22,924 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 69 [2022-04-06 14:20:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:22,924 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2022-04-06 14:20:22,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 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) [2022-04-06 14:20:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2022-04-06 14:20:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:20:22,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:22,925 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:22,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:23,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 14:20:23,130 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 3 times [2022-04-06 14:20:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:23,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850540485] [2022-04-06 14:20:23,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:23,132 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:23,132 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 4 times [2022-04-06 14:20:23,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318325780] [2022-04-06 14:20:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:23,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:23,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:23,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318325780] [2022-04-06 14:20:23,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318325780] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819776135] [2022-04-06 14:20:23,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:23,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:23,263 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) [2022-04-06 14:20:23,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 14:20:23,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:23,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:23,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:20:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:23,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:20:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819776135] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:23,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:23,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:20:23,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850540485] [2022-04-06 14:20:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850540485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:23,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:23,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:20:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130091917] [2022-04-06 14:20:23,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:23,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:20:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:20:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:20:23,704 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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) [2022-04-06 14:20:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:24,120 INFO L93 Difference]: Finished difference Result 297 states and 386 transitions. [2022-04-06 14:20:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:20:24,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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 72 [2022-04-06 14:20:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:24,121 INFO L225 Difference]: With dead ends: 297 [2022-04-06 14:20:24,121 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 14:20:24,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:20:24,123 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 139 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:24,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 14:20:24,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2022-04-06 14:20:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.270440251572327) internal successors, (202), 159 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2022-04-06 14:20:24,228 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 72 [2022-04-06 14:20:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:24,228 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2022-04-06 14:20:24,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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) [2022-04-06 14:20:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2022-04-06 14:20:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 14:20:24,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:24,228 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:24,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:24,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:24,444 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 5 times [2022-04-06 14:20:24,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:24,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1070405712] [2022-04-06 14:20:24,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:24,445 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:24,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 6 times [2022-04-06 14:20:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437364255] [2022-04-06 14:20:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 14:20:24,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437364255] [2022-04-06 14:20:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437364255] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421035923] [2022-04-06 14:20:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:24,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:24,518 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) [2022-04-06 14:20:24,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 14:20:24,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:24,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:20:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-04-06 14:20:24,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 14:20:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421035923] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:24,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:24,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-04-06 14:20:24,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1070405712] [2022-04-06 14:20:24,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1070405712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:24,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:24,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:24,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479042169] [2022-04-06 14:20:24,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:24,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:20:24,842 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-04-06 14:20:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:25,351 INFO L93 Difference]: Finished difference Result 732 states and 956 transitions. [2022-04-06 14:20:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 75 [2022-04-06 14:20:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:25,354 INFO L225 Difference]: With dead ends: 732 [2022-04-06 14:20:25,354 INFO L226 Difference]: Without dead ends: 658 [2022-04-06 14:20:25,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:20:25,355 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 128 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:25,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 61 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-04-06 14:20:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 170. [2022-04-06 14:20:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 165 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-04-06 14:20:25,444 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 75 [2022-04-06 14:20:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:25,445 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-04-06 14:20:25,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-04-06 14:20:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-04-06 14:20:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 14:20:25,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:25,445 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:25,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:25,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:25,659 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 7 times [2022-04-06 14:20:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:25,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855231078] [2022-04-06 14:20:25,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:25,661 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:25,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 8 times [2022-04-06 14:20:25,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:25,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545475110] [2022-04-06 14:20:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 14:20:25,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545475110] [2022-04-06 14:20:25,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545475110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:25,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690698750] [2022-04-06 14:20:25,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:25,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:25,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:25,776 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) [2022-04-06 14:20:25,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 14:20:25,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:20:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:26,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 14:20:26,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:26,623 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:26,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 14:20:26,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690698750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:26,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:26,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 24 [2022-04-06 14:20:26,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855231078] [2022-04-06 14:20:26,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855231078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:26,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:26,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118127424] [2022-04-06 14:20:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:26,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:26,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:20:26,687 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-04-06 14:20:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:27,300 INFO L93 Difference]: Finished difference Result 747 states and 975 transitions. [2022-04-06 14:20:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 79 [2022-04-06 14:20:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:27,303 INFO L225 Difference]: With dead ends: 747 [2022-04-06 14:20:27,303 INFO L226 Difference]: Without dead ends: 673 [2022-04-06 14:20:27,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-04-06 14:20:27,305 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 145 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:27,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-04-06 14:20:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 172. [2022-04-06 14:20:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.2754491017964071) internal successors, (213), 167 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 217 transitions. [2022-04-06 14:20:27,392 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 217 transitions. Word has length 79 [2022-04-06 14:20:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:27,392 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 217 transitions. [2022-04-06 14:20:27,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-04-06 14:20:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 217 transitions. [2022-04-06 14:20:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 14:20:27,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:27,393 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:27,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:27,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 14:20:27,607 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 9 times [2022-04-06 14:20:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140647928] [2022-04-06 14:20:27,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:27,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:27,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:27,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 10 times [2022-04-06 14:20:27,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:27,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887395072] [2022-04-06 14:20:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:27,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 14:20:27,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:27,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887395072] [2022-04-06 14:20:27,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887395072] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:27,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7570701] [2022-04-06 14:20:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:27,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:27,728 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) [2022-04-06 14:20:27,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 14:20:27,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:20:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:28,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-04-06 14:20:28,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:28,648 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:28,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:20:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7570701] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:28,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:28,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 26 [2022-04-06 14:20:28,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:28,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140647928] [2022-04-06 14:20:28,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140647928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:28,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:28,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:20:28,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848692683] [2022-04-06 14:20:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:28,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:20:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:20:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:20:28,731 INFO L87 Difference]: Start difference. First operand 172 states and 217 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 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) [2022-04-06 14:20:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:29,714 INFO L93 Difference]: Finished difference Result 1125 states and 1475 transitions. [2022-04-06 14:20:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:20:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 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 81 [2022-04-06 14:20:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:29,717 INFO L225 Difference]: With dead ends: 1125 [2022-04-06 14:20:29,717 INFO L226 Difference]: Without dead ends: 1051 [2022-04-06 14:20:29,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:20:29,718 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 232 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:29,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 128 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-04-06 14:20:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 176. [2022-04-06 14:20:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.280701754385965) internal successors, (219), 171 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2022-04-06 14:20:29,813 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 81 [2022-04-06 14:20:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:29,813 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2022-04-06 14:20:29,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 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) [2022-04-06 14:20:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2022-04-06 14:20:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 14:20:29,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:29,814 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:29,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:30,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 14:20:30,028 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 11 times [2022-04-06 14:20:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2130353794] [2022-04-06 14:20:30,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:30,029 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:30,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 12 times [2022-04-06 14:20:30,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:30,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540092725] [2022-04-06 14:20:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:30,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 14:20:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540092725] [2022-04-06 14:20:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540092725] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164011247] [2022-04-06 14:20:30,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:30,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:30,162 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:20:30,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 14:20:30,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:20:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-04-06 14:20:30,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:30,781 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 14:20:30,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-04-06 14:20:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-04-06 14:20:30,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164011247] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:30,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:20:30,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 26 [2022-04-06 14:20:30,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:30,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2130353794] [2022-04-06 14:20:30,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2130353794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:30,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:30,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:30,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311361164] [2022-04-06 14:20:30,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:30,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:30,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:30,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:20:30,820 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:31,045 INFO L93 Difference]: Finished difference Result 319 states and 411 transitions. [2022-04-06 14:20:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 2 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 85 [2022-04-06 14:20:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:31,046 INFO L225 Difference]: With dead ends: 319 [2022-04-06 14:20:31,046 INFO L226 Difference]: Without dead ends: 243 [2022-04-06 14:20:31,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:31,047 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:31,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 104 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-06 14:20:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 165. [2022-04-06 14:20:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.26875) internal successors, (203), 160 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 207 transitions. [2022-04-06 14:20:31,155 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 207 transitions. Word has length 85 [2022-04-06 14:20:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:31,156 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 207 transitions. [2022-04-06 14:20:31,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 207 transitions. [2022-04-06 14:20:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:20:31,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:31,156 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:31,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:31,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 14:20:31,372 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 1 times [2022-04-06 14:20:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:31,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115297479] [2022-04-06 14:20:31,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:31,374 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:31,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 2 times [2022-04-06 14:20:31,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:31,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437906386] [2022-04-06 14:20:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:31,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 14:20:33,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:33,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437906386] [2022-04-06 14:20:33,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437906386] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:33,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175147895] [2022-04-06 14:20:33,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:33,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:33,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:33,492 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:20:33,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 14:20:33,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 14:20:33,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:33,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:20:33,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:33,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:33,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:33,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:33,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:34,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:34,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:34,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:34,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:34,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:34,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:35,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-04-06 14:20:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 93 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-04-06 14:20:35,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:36,479 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1196 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1196 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1196) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:20:36,603 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((v_ArrVal_1196 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1196 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1196) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:20:36,613 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((v_ArrVal_1196 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1196 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1196) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:20:36,659 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 2) 4294967296) 10)) (forall ((v_ArrVal_1196 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1196 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1196) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:20:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-04-06 14:20:36,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175147895] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:36,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:36,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 21] total 65 [2022-04-06 14:20:36,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:36,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115297479] [2022-04-06 14:20:36,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115297479] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:36,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:36,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 14:20:36,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908239699] [2022-04-06 14:20:36,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:36,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 14:20:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 14:20:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=3319, Unknown=13, NotChecked=484, Total=4160 [2022-04-06 14:20:36,771 INFO L87 Difference]: Start difference. First operand 165 states and 207 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 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) [2022-04-06 14:20:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:40,246 INFO L93 Difference]: Finished difference Result 434 states and 562 transitions. [2022-04-06 14:20:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 14:20:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 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 102 [2022-04-06 14:20:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:40,248 INFO L225 Difference]: With dead ends: 434 [2022-04-06 14:20:40,248 INFO L226 Difference]: Without dead ends: 395 [2022-04-06 14:20:40,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=841, Invalid=8282, Unknown=13, NotChecked=764, Total=9900 [2022-04-06 14:20:40,250 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 410 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:40,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 119 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 14:20:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-04-06 14:20:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 282. [2022-04-06 14:20:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.288808664259928) internal successors, (357), 277 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 361 transitions. [2022-04-06 14:20:40,479 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 361 transitions. Word has length 102 [2022-04-06 14:20:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:40,479 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 361 transitions. [2022-04-06 14:20:40,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 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) [2022-04-06 14:20:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 361 transitions. [2022-04-06 14:20:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:20:40,480 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:40,480 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:40,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:40,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 14:20:40,695 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 1 times [2022-04-06 14:20:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:40,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945855525] [2022-04-06 14:20:40,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:40,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:40,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 2 times [2022-04-06 14:20:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926217549] [2022-04-06 14:20:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:40,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:41,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 14:20:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:41,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926217549] [2022-04-06 14:20:41,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926217549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:41,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369760446] [2022-04-06 14:20:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:41,406 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:20:41,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 14:20:41,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:41,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:20:41,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:41,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:20:41,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:41,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:20:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-04-06 14:20:42,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:43,021 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_1262 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1262) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1262 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:20:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-04-06 14:20:43,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369760446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:43,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:43,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 34 [2022-04-06 14:20:43,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:43,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945855525] [2022-04-06 14:20:43,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945855525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:43,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:43,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:20:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16297094] [2022-04-06 14:20:43,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:43,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:20:43,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:43,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:20:43,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=934, Unknown=1, NotChecked=62, Total=1122 [2022-04-06 14:20:43,146 INFO L87 Difference]: Start difference. First operand 282 states and 361 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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) [2022-04-06 14:20:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:44,227 INFO L93 Difference]: Finished difference Result 449 states and 578 transitions. [2022-04-06 14:20:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:20:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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 102 [2022-04-06 14:20:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:44,228 INFO L225 Difference]: With dead ends: 449 [2022-04-06 14:20:44,229 INFO L226 Difference]: Without dead ends: 321 [2022-04-06 14:20:44,229 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=1778, Unknown=1, NotChecked=86, Total=2070 [2022-04-06 14:20:44,230 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 103 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:44,230 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 95 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:20:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-06 14:20:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2022-04-06 14:20:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.2843450479233227) internal successors, (402), 313 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 406 transitions. [2022-04-06 14:20:44,453 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 406 transitions. Word has length 102 [2022-04-06 14:20:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:44,454 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 406 transitions. [2022-04-06 14:20:44,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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) [2022-04-06 14:20:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 406 transitions. [2022-04-06 14:20:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:20:44,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:44,455 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:44,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 14:20:44,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:44,671 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 1 times [2022-04-06 14:20:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:44,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724428959] [2022-04-06 14:20:44,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:44,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:44,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 2 times [2022-04-06 14:20:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:44,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050099887] [2022-04-06 14:20:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 14:20:45,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050099887] [2022-04-06 14:20:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050099887] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915574736] [2022-04-06 14:20:45,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:45,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:45,278 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:20:45,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 14:20:45,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:45,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:20:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:45,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:20:45,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:45,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:20:46,357 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:20:46,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:20:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 83 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:20:46,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:57,925 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1328 (Array Int Int)) (|main_~#string_entrada~0.offset| Int)) (let ((.cse1 (select v_ArrVal_1328 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1328) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:20:58,272 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1328 (Array Int Int)) (|main_~#string_entrada~0.offset| Int)) (let ((.cse1 (select v_ArrVal_1328 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1328) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) (not (< (mod (+ c_main_~i~0 2) 4294967296) 10))) is different from false [2022-04-06 14:20:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 196 trivial. 43 not checked. [2022-04-06 14:20:58,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915574736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:58,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:58,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 19] total 44 [2022-04-06 14:20:58,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724428959] [2022-04-06 14:20:58,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724428959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:58,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:58,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:20:58,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848591767] [2022-04-06 14:20:58,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:58,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:20:58,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:20:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1457, Unknown=14, NotChecked=162, Total=1892 [2022-04-06 14:20:58,296 INFO L87 Difference]: Start difference. First operand 318 states and 406 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2022-04-06 14:20:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:59,231 INFO L93 Difference]: Finished difference Result 509 states and 653 transitions. [2022-04-06 14:20:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:20:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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 102 [2022-04-06 14:20:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:59,233 INFO L225 Difference]: With dead ends: 509 [2022-04-06 14:20:59,233 INFO L226 Difference]: Without dead ends: 318 [2022-04-06 14:20:59,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=317, Invalid=2227, Unknown=14, NotChecked=198, Total=2756 [2022-04-06 14:20:59,234 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:59,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 69 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-06 14:20:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-04-06 14:20:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.2747603833865815) internal successors, (399), 313 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 403 transitions. [2022-04-06 14:20:59,471 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 403 transitions. Word has length 102 [2022-04-06 14:20:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:59,472 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 403 transitions. [2022-04-06 14:20:59,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2022-04-06 14:20:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 403 transitions. [2022-04-06 14:20:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:20:59,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:59,472 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:59,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:59,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:59,690 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1906970572, now seen corresponding path program 3 times [2022-04-06 14:20:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:59,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421136795] [2022-04-06 14:20:59,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:59,691 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:59,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1906970572, now seen corresponding path program 4 times [2022-04-06 14:20:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:59,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115951251] [2022-04-06 14:20:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:01,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 199 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-04-06 14:21:01,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115951251] [2022-04-06 14:21:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115951251] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348134146] [2022-04-06 14:21:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:01,628 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:21:01,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 14:21:01,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:01,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 14:21:01,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:01,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:21:01,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:01,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:01,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:02,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:21:05,099 INFO L356 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2022-04-06 14:21:05,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 199 treesize of output 129 [2022-04-06 14:21:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 98 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-04-06 14:21:05,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:10,924 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1395 (Array Int Int))) (or (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse3 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse5 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse4 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse3 2147483647) (< .cse4 (select .cse5 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse3) (< (select .cse5 |c_main_~#vetor_vogais~0.offset|) .cse4))))) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse8 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse7 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse6 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse6 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse7) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse8 2147483647) (<= 4294967296 .cse8) (< .cse7 (select .cse6 |c_main_~#vetor_vogais~0.offset|))))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse9 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse11 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse10 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse9 0) (< (select .cse10 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse11) (< 2147483647 .cse9) (< .cse11 (select .cse10 |c_main_~#vetor_vogais~0.offset|)) (< aux_mod_aux_mod_main_~i~0_26_37 0))))))) is different from false [2022-04-06 14:21:27,768 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((v_ArrVal_1395 (Array Int Int))) (or (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse3 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse5 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse4 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse3 2147483647) (< .cse4 (select .cse5 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse3) (< (select .cse5 |c_main_~#vetor_vogais~0.offset|) .cse4))))) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse8 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse7 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse6 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse6 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse7) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse8 2147483647) (<= 4294967296 .cse8) (< .cse7 (select .cse6 |c_main_~#vetor_vogais~0.offset|))))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse9 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse11 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse10 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse9 0) (< (select .cse10 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse11) (< 2147483647 .cse9) (< .cse11 (select .cse10 |c_main_~#vetor_vogais~0.offset|)) (< aux_mod_aux_mod_main_~i~0_26_37 0)))))))) is different from false [2022-04-06 14:21:28,911 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((v_ArrVal_1395 (Array Int Int))) (or (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse3 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse5 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse4 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse3 2147483647) (< .cse4 (select .cse5 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse3) (< (select .cse5 |c_main_~#vetor_vogais~0.offset|) .cse4))))) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse8 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse7 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse6 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse6 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse7) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse8 2147483647) (<= 4294967296 .cse8) (< .cse7 (select .cse6 |c_main_~#vetor_vogais~0.offset|))))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse9 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse11 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse10 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse9 0) (< (select .cse10 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse11) (< 2147483647 .cse9) (< .cse11 (select .cse10 |c_main_~#vetor_vogais~0.offset|)) (< aux_mod_aux_mod_main_~i~0_26_37 0)))))))) is different from false [2022-04-06 14:21:31,689 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 2) 4294967296) 10)) (forall ((v_ArrVal_1395 (Array Int Int))) (or (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse3 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse5 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|)) (.cse4 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse3 2147483647) (< .cse4 (select .cse5 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse3) (< (select .cse5 |c_main_~#vetor_vogais~0.offset|) .cse4))))) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse8 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse7 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse6 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse6 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse7) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse8 2147483647) (<= 4294967296 .cse8) (< .cse7 (select .cse6 |c_main_~#vetor_vogais~0.offset|))))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int)) (let ((.cse9 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse11 (select v_ArrVal_1395 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse10 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1395) |c_main_~#vetor_vogais~0.base|))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse9 0) (< (select .cse10 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse11) (< 2147483647 .cse9) (< .cse11 (select .cse10 |c_main_~#vetor_vogais~0.offset|)) (< aux_mod_aux_mod_main_~i~0_26_37 0)))))))) is different from false [2022-04-06 14:21:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-04-06 14:21:32,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348134146] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:32,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:32,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 20] total 62 [2022-04-06 14:21:32,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:32,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421136795] [2022-04-06 14:21:32,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421136795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:32,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:32,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:21:32,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108758048] [2022-04-06 14:21:32,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:32,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:21:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:21:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3034, Unknown=4, NotChecked=460, Total=3782 [2022-04-06 14:21:32,623 INFO L87 Difference]: Start difference. First operand 318 states and 403 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 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) [2022-04-06 14:21:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:35,545 INFO L93 Difference]: Finished difference Result 588 states and 758 transitions. [2022-04-06 14:21:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:21:35,546 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 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 102 [2022-04-06 14:21:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:35,548 INFO L225 Difference]: With dead ends: 588 [2022-04-06 14:21:35,548 INFO L226 Difference]: Without dead ends: 549 [2022-04-06 14:21:35,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=680, Invalid=6472, Unknown=4, NotChecked=676, Total=7832 [2022-04-06 14:21:35,552 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 324 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:35,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 94 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:21:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-04-06 14:21:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 306. [2022-04-06 14:21:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2790697674418605) internal successors, (385), 301 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 389 transitions. [2022-04-06 14:21:35,791 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 389 transitions. Word has length 102 [2022-04-06 14:21:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:35,791 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 389 transitions. [2022-04-06 14:21:35,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 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) [2022-04-06 14:21:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 389 transitions. [2022-04-06 14:21:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:21:35,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:35,792 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:35,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:36,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 14:21:36,008 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 1 times [2022-04-06 14:21:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1378773873] [2022-04-06 14:21:36,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:36,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:36,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:36,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2022-04-06 14:21:36,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:36,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557757642] [2022-04-06 14:21:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:36,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 14:21:36,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557757642] [2022-04-06 14:21:36,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557757642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806126181] [2022-04-06 14:21:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:36,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:36,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:36,661 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:21:36,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 14:21:36,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:21:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:37,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:21:37,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:21:37,867 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:21:37,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:21:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 14:21:37,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:52,196 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_1462 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1462 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1462) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|))))) is different from false [2022-04-06 14:21:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-04-06 14:21:52,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806126181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:52,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:52,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 41 [2022-04-06 14:21:52,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1378773873] [2022-04-06 14:21:52,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1378773873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:52,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:52,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:21:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006322200] [2022-04-06 14:21:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:52,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:21:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:21:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1343, Unknown=8, NotChecked=76, Total=1640 [2022-04-06 14:21:52,319 INFO L87 Difference]: Start difference. First operand 306 states and 389 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-04-06 14:21:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:53,361 INFO L93 Difference]: Finished difference Result 458 states and 583 transitions. [2022-04-06 14:21:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:21:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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 102 [2022-04-06 14:21:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:53,362 INFO L225 Difference]: With dead ends: 458 [2022-04-06 14:21:53,362 INFO L226 Difference]: Without dead ends: 306 [2022-04-06 14:21:53,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=287, Invalid=2159, Unknown=8, NotChecked=96, Total=2550 [2022-04-06 14:21:53,363 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:53,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 82 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:21:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-04-06 14:21:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-04-06 14:21:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2724252491694352) internal successors, (383), 301 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 387 transitions. [2022-04-06 14:21:53,600 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 387 transitions. Word has length 102 [2022-04-06 14:21:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:53,600 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 387 transitions. [2022-04-06 14:21:53,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-04-06 14:21:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 387 transitions. [2022-04-06 14:21:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:21:53,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:53,602 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:53,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:53,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:53,817 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2022-04-06 14:21:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:53,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576301967] [2022-04-06 14:21:53,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:53,818 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:53,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 4 times [2022-04-06 14:21:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:53,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096230693] [2022-04-06 14:21:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:21:54,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096230693] [2022-04-06 14:21:54,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096230693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237332101] [2022-04-06 14:21:54,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:54,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:54,438 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:21:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 14:21:54,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 14:21:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:54,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:21:54,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:54,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:21:55,789 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:21:55,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 50 [2022-04-06 14:21:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 14:21:55,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:58,655 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1528 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1528) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= .cse2 2147483647) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse2)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1528) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1528 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse3) (< .cse5 0) (< 2147483647 .cse5) (< aux_mod_aux_mod_main_~i~0_26_37 0))))) is different from false [2022-04-06 14:21:59,675 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1528 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1528) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= .cse2 2147483647) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse2)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1528) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1528 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse3) (< .cse5 0) (< 2147483647 .cse5) (< aux_mod_aux_mod_main_~i~0_26_37 0)))))) is different from false [2022-04-06 14:21:59,752 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1528 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1528) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= .cse2 2147483647) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= 4294967296 .cse2)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1528 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1528) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1528 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse3) (< .cse5 0) (< 2147483647 .cse5) (< aux_mod_aux_mod_main_~i~0_26_37 0)))))) is different from false [2022-04-06 14:21:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 241 trivial. 28 not checked. [2022-04-06 14:21:59,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237332101] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:59,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:59,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 40 [2022-04-06 14:21:59,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:59,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576301967] [2022-04-06 14:21:59,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576301967] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:59,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:59,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:21:59,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537115402] [2022-04-06 14:21:59,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:59,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:21:59,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:21:59,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1188, Unknown=3, NotChecked=216, Total=1560 [2022-04-06 14:21:59,845 INFO L87 Difference]: Start difference. First operand 306 states and 387 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-04-06 14:22:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:00,988 INFO L93 Difference]: Finished difference Result 458 states and 579 transitions. [2022-04-06 14:22:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:22:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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 102 [2022-04-06 14:22:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:00,989 INFO L225 Difference]: With dead ends: 458 [2022-04-06 14:22:00,989 INFO L226 Difference]: Without dead ends: 306 [2022-04-06 14:22:00,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=2031, Unknown=3, NotChecked=282, Total=2550 [2022-04-06 14:22:00,990 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 117 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:00,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 83 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:22:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-04-06 14:22:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-04-06 14:22:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.26578073089701) internal successors, (381), 301 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 385 transitions. [2022-04-06 14:22:01,233 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 385 transitions. Word has length 102 [2022-04-06 14:22:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:01,233 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 385 transitions. [2022-04-06 14:22:01,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-04-06 14:22:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 385 transitions. [2022-04-06 14:22:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:22:01,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:01,235 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:01,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:01,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:01,452 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 5 times [2022-04-06 14:22:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649683270] [2022-04-06 14:22:01,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:01,453 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:01,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:01,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 6 times [2022-04-06 14:22:01,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:01,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460394852] [2022-04-06 14:22:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:01,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:02,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 14:22:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:02,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460394852] [2022-04-06 14:22:02,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460394852] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:02,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123288413] [2022-04-06 14:22:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:22:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:02,798 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:22:02,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 14:22:03,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:22:03,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 14:22:03,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:22:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:22:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:22:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:22:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:22:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:22:23,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:22:23,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:22:23,363 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:22:23,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 37 [2022-04-06 14:22:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 114 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:22:23,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 87 proven. 123 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 14:22:36,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123288413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:36,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:36,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 27] total 71 [2022-04-06 14:22:36,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649683270] [2022-04-06 14:22:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649683270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:36,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:36,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:22:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122993848] [2022-04-06 14:22:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:36,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:22:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:22:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=4143, Unknown=12, NotChecked=0, Total=4970 [2022-04-06 14:22:36,303 INFO L87 Difference]: Start difference. First operand 306 states and 385 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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) [2022-04-06 14:22:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:37,566 INFO L93 Difference]: Finished difference Result 787 states and 998 transitions. [2022-04-06 14:22:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:22:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 102 [2022-04-06 14:22:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:37,581 INFO L225 Difference]: With dead ends: 787 [2022-04-06 14:22:37,581 INFO L226 Difference]: Without dead ends: 733 [2022-04-06 14:22:37,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1139, Invalid=6331, Unknown=12, NotChecked=0, Total=7482 [2022-04-06 14:22:37,582 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 296 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:37,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 61 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:22:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-04-06 14:22:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 513. [2022-04-06 14:22:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 508 states have (on average 1.2696850393700787) internal successors, (645), 508 states have internal predecessors, (645), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 649 transitions. [2022-04-06 14:22:37,993 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 649 transitions. Word has length 102 [2022-04-06 14:22:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:37,993 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 649 transitions. [2022-04-06 14:22:37,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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) [2022-04-06 14:22:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 649 transitions. [2022-04-06 14:22:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:22:38,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:38,019 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:38,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:38,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 14:22:38,224 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 7 times [2022-04-06 14:22:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:38,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574627210] [2022-04-06 14:22:38,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:38,226 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:38,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 8 times [2022-04-06 14:22:38,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:38,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934984600] [2022-04-06 14:22:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:38,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:22:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934984600] [2022-04-06 14:22:39,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934984600] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433599597] [2022-04-06 14:22:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:22:39,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:39,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:39,978 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:22:39,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 14:22:40,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:22:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:22:40,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:40,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:22:40,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:40,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:41,243 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:22:41,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 50 [2022-04-06 14:22:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-04-06 14:22:41,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:43,767 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse5 2147483647) (<= 4294967296 .cse5) (< (select .cse4 |c_main_~#vetor_vogais~0.offset|) .cse3))))) is different from false [2022-04-06 14:22:44,437 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse5 2147483647) (<= 4294967296 .cse5) (< (select .cse4 |c_main_~#vetor_vogais~0.offset|) .cse3)))))) is different from false [2022-04-06 14:22:44,491 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse5 2147483647) (<= 4294967296 .cse5) (< (select .cse4 |c_main_~#vetor_vogais~0.offset|) .cse3)))))) is different from false [2022-04-06 14:22:44,597 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 2) 4294967296) 10)) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse5 2147483647) (<= 4294967296 .cse5) (< (select .cse4 |c_main_~#vetor_vogais~0.offset|) .cse3)))))) is different from false [2022-04-06 14:22:44,659 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (not (< (mod (+ c_main_~i~0 2) 4294967296) 10)) (and (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse2 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296)))) (or (< 2147483647 aux_mod_aux_mod_main_~i~0_26_37) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< .cse2 0) (< 2147483647 .cse2) (< aux_mod_aux_mod_main_~i~0_26_37 0)))) (forall ((aux_mod_aux_mod_main_~i~0_26_37 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (v_ArrVal_1649 (Array Int Int))) (let ((.cse5 (+ aux_mod_aux_mod_main_~i~0_26_37 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse4 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1649) |c_main_~#vetor_vogais~0.base|)) (.cse3 (select v_ArrVal_1649 (+ |c_main_~#string_entrada~0.offset| (mod aux_mod_aux_mod_main_~i~0_26_37 4294967296) (- 4294967296))))) (or (< .cse3 (select .cse4 (+ |c_main_~#vetor_vogais~0.offset| 2))) (<= aux_mod_aux_mod_main_~i~0_26_37 2147483647) (<= 4294967296 aux_mod_aux_mod_main_~i~0_26_37) (<= .cse5 2147483647) (<= 4294967296 .cse5) (< (select .cse4 |c_main_~#vetor_vogais~0.offset|) .cse3)))))) is different from false [2022-04-06 14:22:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-04-06 14:22:44,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433599597] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:44,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:44,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 20] total 58 [2022-04-06 14:22:44,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574627210] [2022-04-06 14:22:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574627210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:44,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:44,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:22:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631041959] [2022-04-06 14:22:44,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:44,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:22:44,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:44,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:22:44,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2458, Unknown=5, NotChecked=530, Total=3306 [2022-04-06 14:22:44,687 INFO L87 Difference]: Start difference. First operand 513 states and 649 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 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) [2022-04-06 14:22:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:47,513 INFO L93 Difference]: Finished difference Result 1136 states and 1450 transitions. [2022-04-06 14:22:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:22:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 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 102 [2022-04-06 14:22:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:47,515 INFO L225 Difference]: With dead ends: 1136 [2022-04-06 14:22:47,515 INFO L226 Difference]: Without dead ends: 896 [2022-04-06 14:22:47,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=681, Invalid=5654, Unknown=5, NotChecked=800, Total=7140 [2022-04-06 14:22:47,516 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 244 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:47,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 91 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 14:22:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-04-06 14:22:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 718. [2022-04-06 14:22:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 713 states have (on average 1.2678821879382889) internal successors, (904), 713 states have internal predecessors, (904), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 908 transitions. [2022-04-06 14:22:48,102 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 908 transitions. Word has length 102 [2022-04-06 14:22:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:48,102 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 908 transitions. [2022-04-06 14:22:48,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 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) [2022-04-06 14:22:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 908 transitions. [2022-04-06 14:22:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:22:48,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:48,103 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:48,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:48,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 14:22:48,320 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 9 times [2022-04-06 14:22:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:48,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1342374709] [2022-04-06 14:22:48,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:48,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:48,322 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 10 times [2022-04-06 14:22:48,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:48,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289267691] [2022-04-06 14:22:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:49,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 149 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 14:22:49,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289267691] [2022-04-06 14:22:49,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289267691] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714915860] [2022-04-06 14:22:49,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:22:49,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:49,771 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:22:49,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 14:22:50,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:22:50,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 14:22:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:50,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:22:50,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:50,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-04-06 14:22:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:22:50,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:51,696 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_1716 (Array Int Int))) (let ((.cse1 (select v_ArrVal_1716 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1716) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:22:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-04-06 14:22:51,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714915860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:51,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:51,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 17] total 51 [2022-04-06 14:22:51,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:51,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1342374709] [2022-04-06 14:22:51,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1342374709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:51,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:51,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:22:51,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375729988] [2022-04-06 14:22:51,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:51,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:22:51,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:22:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2193, Unknown=1, NotChecked=96, Total=2550 [2022-04-06 14:22:51,794 INFO L87 Difference]: Start difference. First operand 718 states and 908 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 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) [2022-04-06 14:22:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:53,799 INFO L93 Difference]: Finished difference Result 1515 states and 1906 transitions. [2022-04-06 14:22:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:22:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 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 102 [2022-04-06 14:22:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:53,803 INFO L225 Difference]: With dead ends: 1515 [2022-04-06 14:22:53,803 INFO L226 Difference]: Without dead ends: 1467 [2022-04-06 14:22:53,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=478, Invalid=4355, Unknown=1, NotChecked=136, Total=4970 [2022-04-06 14:22:53,804 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 372 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:53,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 75 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:22:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-04-06 14:22:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1235. [2022-04-06 14:22:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1230 states have (on average 1.267479674796748) internal successors, (1559), 1230 states have internal predecessors, (1559), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1563 transitions. [2022-04-06 14:22:54,867 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1563 transitions. Word has length 102 [2022-04-06 14:22:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:54,868 INFO L478 AbstractCegarLoop]: Abstraction has 1235 states and 1563 transitions. [2022-04-06 14:22:54,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 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) [2022-04-06 14:22:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1563 transitions. [2022-04-06 14:22:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:22:54,870 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:54,870 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:54,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:55,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 14:22:55,086 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 11 times [2022-04-06 14:22:55,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:55,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1643505724] [2022-04-06 14:22:55,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:55,088 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:55,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 12 times [2022-04-06 14:22:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:55,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901671762] [2022-04-06 14:22:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:55,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:56,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 172 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 14:22:56,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:56,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901671762] [2022-04-06 14:22:56,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901671762] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:56,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064455367] [2022-04-06 14:22:56,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:22:56,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:56,762 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:22:56,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 14:22:57,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 14:22:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 14:22:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:57,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:22:57,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:57,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:22:58,232 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:22:58,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:22:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 14:22:58,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:09,757 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_1783 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1783) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1783 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:23:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 14:23:09,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064455367] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:09,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:09,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13, 15] total 54 [2022-04-06 14:23:09,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:09,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1643505724] [2022-04-06 14:23:09,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1643505724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:09,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:09,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 14:23:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772691851] [2022-04-06 14:23:09,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:09,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 14:23:09,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 14:23:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2477, Unknown=7, NotChecked=102, Total=2862 [2022-04-06 14:23:09,869 INFO L87 Difference]: Start difference. First operand 1235 states and 1563 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 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) [2022-04-06 14:23:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:14,093 INFO L93 Difference]: Finished difference Result 2366 states and 2996 transitions. [2022-04-06 14:23:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 14:23:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 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 102 [2022-04-06 14:23:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:14,098 INFO L225 Difference]: With dead ends: 2366 [2022-04-06 14:23:14,098 INFO L226 Difference]: Without dead ends: 1900 [2022-04-06 14:23:14,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=738, Invalid=6741, Unknown=7, NotChecked=170, Total=7656 [2022-04-06 14:23:14,099 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 375 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:14,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 94 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 14:23:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-04-06 14:23:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1712. [2022-04-06 14:23:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1707 states have (on average 1.2630345635618043) internal successors, (2156), 1707 states have internal predecessors, (2156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2160 transitions. [2022-04-06 14:23:15,569 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2160 transitions. Word has length 102 [2022-04-06 14:23:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:15,569 INFO L478 AbstractCegarLoop]: Abstraction has 1712 states and 2160 transitions. [2022-04-06 14:23:15,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 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) [2022-04-06 14:23:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2160 transitions. [2022-04-06 14:23:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:23:15,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:15,571 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:15,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:15,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:15,789 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 13 times [2022-04-06 14:23:15,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364103557] [2022-04-06 14:23:15,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:15,790 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:15,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 14 times [2022-04-06 14:23:15,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:15,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451116065] [2022-04-06 14:23:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:15,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 173 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 14:23:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451116065] [2022-04-06 14:23:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451116065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234495793] [2022-04-06 14:23:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:17,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:17,833 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:17,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 14:23:18,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:18,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 14:23:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:18,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:23:18,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:18,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:23:19,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:19,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2022-04-06 14:23:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 83 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:23:19,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:20,818 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1849 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1849) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1849 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-04-06 14:23:20,969 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((v_ArrVal_1849 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1849) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1849 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0))))) is different from false [2022-04-06 14:23:20,981 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1849 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_1849) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_1849 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) (not (< (mod (+ c_main_~i~0 2) 4294967296) 10))) is different from false [2022-04-06 14:23:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 93 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 43 not checked. [2022-04-06 14:23:21,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234495793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:21,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:21,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 23] total 66 [2022-04-06 14:23:21,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:21,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364103557] [2022-04-06 14:23:21,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364103557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:21,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:21,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 14:23:21,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643101830] [2022-04-06 14:23:21,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:21,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 14:23:21,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:21,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 14:23:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3442, Unknown=33, NotChecked=372, Total=4290 [2022-04-06 14:23:21,061 INFO L87 Difference]: Start difference. First operand 1712 states and 2160 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 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) [2022-04-06 14:23:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:25,017 INFO L93 Difference]: Finished difference Result 2059 states and 2603 transitions. [2022-04-06 14:23:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 14:23:25,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 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 102 [2022-04-06 14:23:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:25,022 INFO L225 Difference]: With dead ends: 2059 [2022-04-06 14:23:25,022 INFO L226 Difference]: Without dead ends: 2017 [2022-04-06 14:23:25,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=814, Invalid=6975, Unknown=55, NotChecked=528, Total=8372 [2022-04-06 14:23:25,023 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 309 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:25,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 97 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:23:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-04-06 14:23:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1906. [2022-04-06 14:23:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1901 states have (on average 1.2609153077327722) internal successors, (2397), 1901 states have internal predecessors, (2397), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2401 transitions. [2022-04-06 14:23:26,701 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2401 transitions. Word has length 102 [2022-04-06 14:23:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:26,701 INFO L478 AbstractCegarLoop]: Abstraction has 1906 states and 2401 transitions. [2022-04-06 14:23:26,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 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) [2022-04-06 14:23:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2401 transitions. [2022-04-06 14:23:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:23:26,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:26,704 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:26,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:26,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 14:23:26,920 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 15 times [2022-04-06 14:23:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624622344] [2022-04-06 14:23:26,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:26,922 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:26,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 16 times [2022-04-06 14:23:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:26,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068675939] [2022-04-06 14:23:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:26,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:27,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 14:23:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068675939] [2022-04-06 14:23:27,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068675939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186214839] [2022-04-06 14:23:27,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:27,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:27,176 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:27,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 14:23:27,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:27,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:23:27,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 14:23:27,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 14:23:28,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186214839] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:28,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:28,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-04-06 14:23:28,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624622344] [2022-04-06 14:23:28,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624622344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:28,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:28,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:23:28,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183144179] [2022-04-06 14:23:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:28,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:23:28,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:23:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:23:28,204 INFO L87 Difference]: Start difference. First operand 1906 states and 2401 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 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) [2022-04-06 14:23:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:40,019 INFO L93 Difference]: Finished difference Result 10879 states and 13573 transitions. [2022-04-06 14:23:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:23:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 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 102 [2022-04-06 14:23:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:40,049 INFO L225 Difference]: With dead ends: 10879 [2022-04-06 14:23:40,049 INFO L226 Difference]: Without dead ends: 10871 [2022-04-06 14:23:40,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 14:23:40,081 INFO L913 BasicCegarLoop]: 206 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:40,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 263 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 14:23:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2022-04-06 14:23:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 7361. [2022-04-06 14:23:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 7356 states have (on average 1.259516041326808) internal successors, (9265), 7356 states have internal predecessors, (9265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 9269 transitions. [2022-04-06 14:23:47,032 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 9269 transitions. Word has length 102 [2022-04-06 14:23:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:47,033 INFO L478 AbstractCegarLoop]: Abstraction has 7361 states and 9269 transitions. [2022-04-06 14:23:47,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 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) [2022-04-06 14:23:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 9269 transitions. [2022-04-06 14:23:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:23:47,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:47,042 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:47,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:47,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 14:23:47,255 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 17 times [2022-04-06 14:23:47,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:47,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236506465] [2022-04-06 14:23:47,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:47,257 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:47,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 18 times [2022-04-06 14:23:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:47,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963775667] [2022-04-06 14:23:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:48,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 88 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-04-06 14:23:48,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963775667] [2022-04-06 14:23:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963775667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819145368] [2022-04-06 14:23:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:48,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:48,653 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:23:48,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 14:23:49,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:23:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:23:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:50,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:23:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:50,249 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:50,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 30 [2022-04-06 14:23:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 92 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-04-06 14:23:50,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:50,988 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:23:50,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:23:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 14:23:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819145368] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:51,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:51,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 54 [2022-04-06 14:23:51,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236506465] [2022-04-06 14:23:51,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236506465] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:51,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:51,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:23:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669848934] [2022-04-06 14:23:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:51,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:23:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:23:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:23:51,660 INFO L87 Difference]: Start difference. First operand 7361 states and 9269 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 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) [2022-04-06 14:24:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:00,290 INFO L93 Difference]: Finished difference Result 8826 states and 11122 transitions. [2022-04-06 14:24:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:24:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 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 102 [2022-04-06 14:24:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:00,305 INFO L225 Difference]: With dead ends: 8826 [2022-04-06 14:24:00,306 INFO L226 Difference]: Without dead ends: 7598 [2022-04-06 14:24:00,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 14:24:00,309 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 229 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:00,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 54 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:24:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2022-04-06 14:24:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 7119. [2022-04-06 14:24:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7119 states, 7114 states have (on average 1.2555524318245712) internal successors, (8932), 7114 states have internal predecessors, (8932), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7119 states to 7119 states and 8936 transitions. [2022-04-06 14:24:07,103 INFO L78 Accepts]: Start accepts. Automaton has 7119 states and 8936 transitions. Word has length 102 [2022-04-06 14:24:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:07,103 INFO L478 AbstractCegarLoop]: Abstraction has 7119 states and 8936 transitions. [2022-04-06 14:24:07,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 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) [2022-04-06 14:24:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7119 states and 8936 transitions. [2022-04-06 14:24:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:24:07,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:07,112 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:07,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:07,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:07,318 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 19 times [2022-04-06 14:24:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:07,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847856746] [2022-04-06 14:24:07,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:07,319 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:07,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 20 times [2022-04-06 14:24:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450642581] [2022-04-06 14:24:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:07,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-04-06 14:24:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450642581] [2022-04-06 14:24:07,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450642581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588246731] [2022-04-06 14:24:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:07,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:07,969 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:24:07,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 14:24:08,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:08,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:24:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:08,862 INFO L356 Elim1Store]: treesize reduction 68, result has 48.9 percent of original size [2022-04-06 14:24:08,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 114 [2022-04-06 14:24:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 14:24:08,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:11,880 INFO L356 Elim1Store]: treesize reduction 147, result has 69.6 percent of original size [2022-04-06 14:24:11,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 437 [2022-04-06 14:25:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 14:25:58,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588246731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:58,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:58,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 16] total 41 [2022-04-06 14:25:58,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847856746] [2022-04-06 14:25:58,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847856746] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:58,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:58,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:25:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417992521] [2022-04-06 14:25:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:58,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:25:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:58,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:25:58,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 14:25:58,246 INFO L87 Difference]: Start difference. First operand 7119 states and 8936 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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) [2022-04-06 14:26:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:06,209 INFO L93 Difference]: Finished difference Result 9390 states and 11728 transitions. [2022-04-06 14:26:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:26:06,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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 102 [2022-04-06 14:26:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:06,221 INFO L225 Difference]: With dead ends: 9390 [2022-04-06 14:26:06,221 INFO L226 Difference]: Without dead ends: 7708 [2022-04-06 14:26:06,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 14:26:06,241 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:06,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:26:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2022-04-06 14:26:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7623. [2022-04-06 14:26:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7623 states, 7618 states have (on average 1.2477028091362563) internal successors, (9505), 7618 states have internal predecessors, (9505), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7623 states to 7623 states and 9509 transitions. [2022-04-06 14:26:13,432 INFO L78 Accepts]: Start accepts. Automaton has 7623 states and 9509 transitions. Word has length 102 [2022-04-06 14:26:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:13,432 INFO L478 AbstractCegarLoop]: Abstraction has 7623 states and 9509 transitions. [2022-04-06 14:26:13,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 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) [2022-04-06 14:26:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 7623 states and 9509 transitions. [2022-04-06 14:26:13,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:26:13,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:13,440 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:13,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 14:26:13,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 14:26:13,647 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1367385464, now seen corresponding path program 21 times [2022-04-06 14:26:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414726012] [2022-04-06 14:26:13,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:13,649 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:13,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:13,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1367385464, now seen corresponding path program 22 times [2022-04-06 14:26:13,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:13,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994387152] [2022-04-06 14:26:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:14,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 14:26:14,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994387152] [2022-04-06 14:26:14,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994387152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529107326] [2022-04-06 14:26:14,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:26:14,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:14,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:14,171 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:26:14,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 14:26:14,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:26:14,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:26:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:14,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:26:14,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:14,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:26:15,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-04-06 14:26:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:26:15,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:16,116 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2077 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2077) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2077 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-04-06 14:26:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 14:26:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529107326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:16,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:16,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 41 [2022-04-06 14:26:16,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414726012] [2022-04-06 14:26:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414726012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:16,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:16,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:26:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334692830] [2022-04-06 14:26:16,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:16,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:26:16,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:26:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1398, Unknown=1, NotChecked=76, Total=1640 [2022-04-06 14:26:16,233 INFO L87 Difference]: Start difference. First operand 7623 states and 9509 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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) [2022-04-06 14:26:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:23,930 INFO L93 Difference]: Finished difference Result 10852 states and 13447 transitions. [2022-04-06 14:26:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:26:23,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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 102 [2022-04-06 14:26:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:23,943 INFO L225 Difference]: With dead ends: 10852 [2022-04-06 14:26:23,943 INFO L226 Difference]: Without dead ends: 7014 [2022-04-06 14:26:23,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=2394, Unknown=1, NotChecked=100, Total=2756 [2022-04-06 14:26:23,951 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 177 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:23,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 85 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:26:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2022-04-06 14:26:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6463. [2022-04-06 14:26:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6463 states, 6458 states have (on average 1.239857541034376) internal successors, (8007), 6458 states have internal predecessors, (8007), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 8011 transitions. [2022-04-06 14:26:30,299 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 8011 transitions. Word has length 102 [2022-04-06 14:26:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:30,300 INFO L478 AbstractCegarLoop]: Abstraction has 6463 states and 8011 transitions. [2022-04-06 14:26:30,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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) [2022-04-06 14:26:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 8011 transitions. [2022-04-06 14:26:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:26:30,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:30,307 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:30,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 14:26:30,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:30,514 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -67154106, now seen corresponding path program 23 times [2022-04-06 14:26:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [118036130] [2022-04-06 14:26:30,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:30,516 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:30,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash -67154106, now seen corresponding path program 24 times [2022-04-06 14:26:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:30,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733273986] [2022-04-06 14:26:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 14:26:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733273986] [2022-04-06 14:26:32,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733273986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024683403] [2022-04-06 14:26:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:26:32,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:32,965 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:26:32,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 14:26:34,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:26:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 14:26:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:51,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:26:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:26:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:26:51,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:26:51,652 INFO L356 Elim1Store]: treesize reduction 162, result has 31.9 percent of original size [2022-04-06 14:26:51,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 109 [2022-04-06 14:26:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 121 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 14:26:51,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:27:05,528 INFO L356 Elim1Store]: treesize reduction 190, result has 58.6 percent of original size [2022-04-06 14:27:05,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 198 treesize of output 341 [2022-04-06 14:27:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 14:27:08,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024683403] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:27:08,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:27:08,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 30] total 83 [2022-04-06 14:27:08,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:27:08,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [118036130] [2022-04-06 14:27:08,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [118036130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:27:08,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:27:08,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 14:27:08,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541771347] [2022-04-06 14:27:08,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:27:08,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 14:27:08,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 14:27:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=5982, Unknown=5, NotChecked=0, Total=6806 [2022-04-06 14:27:08,876 INFO L87 Difference]: Start difference. First operand 6463 states and 8011 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 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) [2022-04-06 14:27:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:27:21,038 INFO L93 Difference]: Finished difference Result 9134 states and 11321 transitions. [2022-04-06 14:27:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 14:27:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 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 102 [2022-04-06 14:27:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:27:21,056 INFO L225 Difference]: With dead ends: 9134 [2022-04-06 14:27:21,056 INFO L226 Difference]: Without dead ends: 8959 [2022-04-06 14:27:21,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=1412, Invalid=11015, Unknown=5, NotChecked=0, Total=12432 [2022-04-06 14:27:21,060 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 288 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:27:21,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 121 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 14:27:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2022-04-06 14:27:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 6481. [2022-04-06 14:27:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 6476 states have (on average 1.239808523780111) internal successors, (8029), 6476 states have internal predecessors, (8029), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:27:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 8033 transitions. [2022-04-06 14:27:27,435 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 8033 transitions. Word has length 102 [2022-04-06 14:27:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:27:27,435 INFO L478 AbstractCegarLoop]: Abstraction has 6481 states and 8033 transitions. [2022-04-06 14:27:27,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 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) [2022-04-06 14:27:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 8033 transitions. [2022-04-06 14:27:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:27:27,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:27:27,442 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:27:27,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 14:27:27,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:27:27,646 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:27:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:27:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash -460181116, now seen corresponding path program 25 times [2022-04-06 14:27:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:27,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951914920] [2022-04-06 14:27:27,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:27:27,648 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:27:27,648 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:27:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash -460181116, now seen corresponding path program 26 times [2022-04-06 14:27:27,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:27:27,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202865507] [2022-04-06 14:27:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:27:27,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:27:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:27:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 14:27:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:27:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202865507] [2022-04-06 14:27:28,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202865507] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:27:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637052388] [2022-04-06 14:27:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:27:28,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:27:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:27:28,231 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:27:28,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 14:27:28,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:27:28,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:27:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 14:27:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:27:28,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:27:28,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:28,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:27:29,510 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:27:29,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:27:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 14:27:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:27:47,664 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2198 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2198) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2198 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:27:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-04-06 14:27:47,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637052388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:27:47,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:27:47,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 18] total 43 [2022-04-06 14:27:47,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:27:47,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951914920] [2022-04-06 14:27:47,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951914920] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:27:47,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:27:47,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:27:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101307722] [2022-04-06 14:27:47,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:27:47,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:27:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:27:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1453, Unknown=10, NotChecked=80, Total=1806 [2022-04-06 14:27:47,822 INFO L87 Difference]: Start difference. First operand 6481 states and 8033 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-04-06 14:27:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:27:54,772 INFO L93 Difference]: Finished difference Result 9325 states and 11523 transitions. [2022-04-06 14:27:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:27:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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 102 [2022-04-06 14:27:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:27:54,786 INFO L225 Difference]: With dead ends: 9325 [2022-04-06 14:27:54,786 INFO L226 Difference]: Without dead ends: 6153 [2022-04-06 14:27:54,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=337, Invalid=2309, Unknown=10, NotChecked=100, Total=2756 [2022-04-06 14:27:54,792 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:27:54,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 65 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:27:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-04-06 14:28:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 6068. [2022-04-06 14:28:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6068 states, 6063 states have (on average 1.2325581395348837) internal successors, (7473), 6063 states have internal predecessors, (7473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 7477 transitions. [2022-04-06 14:28:00,875 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 7477 transitions. Word has length 102 [2022-04-06 14:28:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:00,875 INFO L478 AbstractCegarLoop]: Abstraction has 6068 states and 7477 transitions. [2022-04-06 14:28:00,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-04-06 14:28:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 7477 transitions. [2022-04-06 14:28:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:28:00,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:00,881 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:00,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 14:28:01,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 14:28:01,095 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1297013632, now seen corresponding path program 27 times [2022-04-06 14:28:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1758287881] [2022-04-06 14:28:01,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:01,097 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:01,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1297013632, now seen corresponding path program 28 times [2022-04-06 14:28:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864329994] [2022-04-06 14:28:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:01,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:01,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:28:01,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864329994] [2022-04-06 14:28:01,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864329994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962032182] [2022-04-06 14:28:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:28:01,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:01,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:01,600 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:28:01,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 14:28:01,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:28:01,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 14:28:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:01,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:28:01,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:01,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:01,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:28:02,899 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:28:02,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 50 [2022-04-06 14:28:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 46 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 14:28:02,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:04,340 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_2265 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2265 (+ (mod aux_mod_main_~i~0_26 4294967296) |main_~#string_entrada~0.offset|))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2265) |c_main_~#vetor_vogais~0.base|))) (or (< aux_mod_main_~i~0_26 0) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< 2147483647 aux_mod_main_~i~0_26) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:28:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 14:28:04,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962032182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:04,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:04,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-04-06 14:28:04,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:04,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1758287881] [2022-04-06 14:28:04,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1758287881] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:04,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:04,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:28:04,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115010318] [2022-04-06 14:28:04,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:04,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:28:04,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:28:04,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1254, Unknown=1, NotChecked=72, Total=1482 [2022-04-06 14:28:04,674 INFO L87 Difference]: Start difference. First operand 6068 states and 7477 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-04-06 14:28:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:11,136 INFO L93 Difference]: Finished difference Result 8233 states and 10105 transitions. [2022-04-06 14:28:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:28:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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 102 [2022-04-06 14:28:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:11,146 INFO L225 Difference]: With dead ends: 8233 [2022-04-06 14:28:11,147 INFO L226 Difference]: Without dead ends: 5621 [2022-04-06 14:28:11,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=236, Invalid=2119, Unknown=1, NotChecked=94, Total=2450 [2022-04-06 14:28:11,152 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 172 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:28:11,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 78 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:28:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2022-04-06 14:28:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5480. [2022-04-06 14:28:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5475 states have (on average 1.2310502283105023) internal successors, (6740), 5475 states have internal predecessors, (6740), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 6744 transitions. [2022-04-06 14:28:16,708 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 6744 transitions. Word has length 102 [2022-04-06 14:28:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:16,708 INFO L478 AbstractCegarLoop]: Abstraction has 5480 states and 6744 transitions. [2022-04-06 14:28:16,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-04-06 14:28:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 6744 transitions. [2022-04-06 14:28:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:28:16,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:16,714 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:16,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 14:28:16,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 14:28:16,927 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -407448828, now seen corresponding path program 29 times [2022-04-06 14:28:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:16,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162309646] [2022-04-06 14:28:16,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:16,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:16,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -407448828, now seen corresponding path program 30 times [2022-04-06 14:28:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833528802] [2022-04-06 14:28:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:17,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 14:28:17,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:17,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833528802] [2022-04-06 14:28:17,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833528802] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:17,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644636476] [2022-04-06 14:28:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:28:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:17,988 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:28:17,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 14:28:19,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:28:19,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 14:28:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:19,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-04-06 14:28:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:28:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:28:20,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:28:20,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:28:20,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 37 [2022-04-06 14:28:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 86 proven. 103 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 14:28:20,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 14:28:23,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644636476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:23,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:23,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 23] total 63 [2022-04-06 14:28:23,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:23,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162309646] [2022-04-06 14:28:23,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162309646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:23,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:23,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:28:23,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799950461] [2022-04-06 14:28:23,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:23,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:28:23,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:28:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 14:28:23,140 INFO L87 Difference]: Start difference. First operand 5480 states and 6744 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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) [2022-04-06 14:28:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:30,466 INFO L93 Difference]: Finished difference Result 7561 states and 9199 transitions. [2022-04-06 14:28:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:28:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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 102 [2022-04-06 14:28:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:30,474 INFO L225 Difference]: With dead ends: 7561 [2022-04-06 14:28:30,474 INFO L226 Difference]: Without dead ends: 6118 [2022-04-06 14:28:30,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=840, Invalid=5012, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 14:28:30,476 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 279 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:28:30,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 48 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:28:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2022-04-06 14:28:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 5136. [2022-04-06 14:28:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5136 states, 5131 states have (on average 1.2116546482167219) internal successors, (6217), 5131 states have internal predecessors, (6217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 6221 transitions. [2022-04-06 14:28:35,709 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 6221 transitions. Word has length 102 [2022-04-06 14:28:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:35,710 INFO L478 AbstractCegarLoop]: Abstraction has 5136 states and 6221 transitions. [2022-04-06 14:28:35,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 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) [2022-04-06 14:28:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 6221 transitions. [2022-04-06 14:28:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:28:35,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:35,715 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:35,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 14:28:35,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 14:28:35,921 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 31 times [2022-04-06 14:28:35,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:35,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92324500] [2022-04-06 14:28:35,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:35,922 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:35,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 32 times [2022-04-06 14:28:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:35,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072718865] [2022-04-06 14:28:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:35,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:37,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 183 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-06 14:28:37,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072718865] [2022-04-06 14:28:37,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072718865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:37,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312332930] [2022-04-06 14:28:37,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:28:37,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:37,844 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:28:37,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 14:28:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:28:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:38,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 14:28:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:38,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:28:38,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:38,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 14:28:39,530 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:28:39,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:28:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 14:28:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:55,380 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2387 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2387 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2387) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:28:55,472 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2387 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2387 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2387) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) (not (< (mod c_main_~i~0 4294967296) 10))) is different from false [2022-04-06 14:28:55,483 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2387 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2387 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2387) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) (not (< (mod (+ c_main_~i~0 1) 4294967296) 10))) is different from false [2022-04-06 14:28:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 11 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-04-06 14:28:55,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312332930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:55,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 21] total 63 [2022-04-06 14:28:55,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:55,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92324500] [2022-04-06 14:28:55,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92324500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:55,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:28:55,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177842616] [2022-04-06 14:28:55,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:55,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:28:55,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:28:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3164, Unknown=20, NotChecked=354, Total=3906 [2022-04-06 14:28:55,781 INFO L87 Difference]: Start difference. First operand 5136 states and 6221 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-04-06 14:29:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:05,036 INFO L93 Difference]: Finished difference Result 6315 states and 7710 transitions. [2022-04-06 14:29:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 14:29:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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 102 [2022-04-06 14:29:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:05,045 INFO L225 Difference]: With dead ends: 6315 [2022-04-06 14:29:05,045 INFO L226 Difference]: Without dead ends: 6125 [2022-04-06 14:29:05,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=760, Invalid=6888, Unknown=20, NotChecked=522, Total=8190 [2022-04-06 14:29:05,047 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 290 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:29:05,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 111 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 14:29:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2022-04-06 14:29:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 5598. [2022-04-06 14:29:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5593 states have (on average 1.210620418380118) internal successors, (6771), 5593 states have internal predecessors, (6771), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:29:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 6775 transitions. [2022-04-06 14:29:10,854 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 6775 transitions. Word has length 102 [2022-04-06 14:29:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:10,854 INFO L478 AbstractCegarLoop]: Abstraction has 5598 states and 6775 transitions. [2022-04-06 14:29:10,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-04-06 14:29:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 6775 transitions. [2022-04-06 14:29:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:29:10,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:10,861 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:10,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 14:29:11,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:11,067 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 33 times [2022-04-06 14:29:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409398838] [2022-04-06 14:29:11,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:11,069 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:11,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 34 times [2022-04-06 14:29:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:11,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878546824] [2022-04-06 14:29:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:12,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 14:29:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:12,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878546824] [2022-04-06 14:29:12,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878546824] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220638576] [2022-04-06 14:29:12,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:29:12,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:12,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:12,351 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:29:12,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 14:29:12,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:29:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 14:29:12,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:12,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:29:12,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:12,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:13,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-04-06 14:29:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 46 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:29:13,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:14,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2454 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2454) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2454 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:29:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 54 proven. 4 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-04-06 14:29:14,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220638576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:14,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:14,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 14] total 42 [2022-04-06 14:29:14,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409398838] [2022-04-06 14:29:14,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409398838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:14,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:14,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:29:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410995968] [2022-04-06 14:29:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:14,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:29:14,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:29:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1408, Unknown=1, NotChecked=78, Total=1722 [2022-04-06 14:29:14,434 INFO L87 Difference]: Start difference. First operand 5598 states and 6775 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-04-06 14:29:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:21,823 INFO L93 Difference]: Finished difference Result 6653 states and 8036 transitions. [2022-04-06 14:29:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:29:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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 102 [2022-04-06 14:29:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:21,830 INFO L225 Difference]: With dead ends: 6653 [2022-04-06 14:29:21,830 INFO L226 Difference]: Without dead ends: 6318 [2022-04-06 14:29:21,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=399, Invalid=2796, Unknown=1, NotChecked=110, Total=3306 [2022-04-06 14:29:21,832 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 259 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:29:21,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 65 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:29:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2022-04-06 14:29:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5574. [2022-04-06 14:29:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5574 states, 5569 states have (on average 1.2086550547674628) internal successors, (6731), 5569 states have internal predecessors, (6731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:29:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 6735 transitions. [2022-04-06 14:29:27,681 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 6735 transitions. Word has length 102 [2022-04-06 14:29:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:27,681 INFO L478 AbstractCegarLoop]: Abstraction has 5574 states and 6735 transitions. [2022-04-06 14:29:27,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-04-06 14:29:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 6735 transitions. [2022-04-06 14:29:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:29:27,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:27,685 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:27,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 14:29:27,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 14:29:27,903 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 35 times [2022-04-06 14:29:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:27,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128083642] [2022-04-06 14:29:27,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:27,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:27,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 36 times [2022-04-06 14:29:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054337379] [2022-04-06 14:29:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:28,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 14:29:28,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054337379] [2022-04-06 14:29:28,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054337379] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541006692] [2022-04-06 14:29:28,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:29:28,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:28,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:28,520 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:29:28,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 14:29:29,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:29:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:29:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:30,293 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-04-06 14:29:30,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2022-04-06 14:29:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 60 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 14:29:30,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:31,593 INFO L356 Elim1Store]: treesize reduction 116, result has 65.0 percent of original size [2022-04-06 14:29:31,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 140 treesize of output 266 [2022-04-06 14:29:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 14:29:32,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541006692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:32,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:32,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 43 [2022-04-06 14:29:32,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:32,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128083642] [2022-04-06 14:29:32,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128083642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:32,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:32,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:29:32,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878298423] [2022-04-06 14:29:32,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:32,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:29:32,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:29:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:29:32,282 INFO L87 Difference]: Start difference. First operand 5574 states and 6735 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-04-06 14:29:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:39,369 INFO L93 Difference]: Finished difference Result 8030 states and 9694 transitions. [2022-04-06 14:29:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:29:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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 102 [2022-04-06 14:29:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:39,377 INFO L225 Difference]: With dead ends: 8030 [2022-04-06 14:29:39,377 INFO L226 Difference]: Without dead ends: 6148 [2022-04-06 14:29:39,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:29:39,381 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:29:39,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:29:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2022-04-06 14:29:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 6078. [2022-04-06 14:29:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6078 states, 6073 states have (on average 1.199077885723695) internal successors, (7282), 6073 states have internal predecessors, (7282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:29:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 7286 transitions. [2022-04-06 14:29:45,778 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 7286 transitions. Word has length 102 [2022-04-06 14:29:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:45,778 INFO L478 AbstractCegarLoop]: Abstraction has 6078 states and 7286 transitions. [2022-04-06 14:29:45,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 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) [2022-04-06 14:29:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 7286 transitions. [2022-04-06 14:29:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:29:45,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:45,782 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:45,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 14:29:45,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 14:29:45,986 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 37 times [2022-04-06 14:29:45,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:45,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368763490] [2022-04-06 14:29:45,988 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:45,988 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:45,988 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 38 times [2022-04-06 14:29:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:45,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566762141] [2022-04-06 14:29:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:45,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:46,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 14:29:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:46,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566762141] [2022-04-06 14:29:46,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566762141] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:46,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213929810] [2022-04-06 14:29:46,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:29:46,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:46,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:46,488 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:29:46,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 14:29:46,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:29:46,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 14:29:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:46,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:29:46,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:46,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:46,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:46,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:46,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:46,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:46,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:47,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:47,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:47,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:47,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:29:48,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:29:48,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2022-04-06 14:29:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-04-06 14:29:48,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:49,095 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2575 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2575 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2575) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:29:49,173 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((v_ArrVal_2575 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2575 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2575) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:29:49,182 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((v_ArrVal_2575 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2575 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2575) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:29:49,220 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 2) 4294967296) 10)) (forall ((v_ArrVal_2575 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2575 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2575) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:29:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-04-06 14:29:49,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213929810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:49,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:49,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 47 [2022-04-06 14:29:49,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368763490] [2022-04-06 14:29:49,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368763490] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:49,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:49,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:29:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016204318] [2022-04-06 14:29:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:49,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:29:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:29:49,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1583, Unknown=4, NotChecked=340, Total=2162 [2022-04-06 14:29:49,246 INFO L87 Difference]: Start difference. First operand 6078 states and 7286 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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) [2022-04-06 14:29:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:55,884 INFO L93 Difference]: Finished difference Result 8650 states and 10374 transitions. [2022-04-06 14:29:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:29:55,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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 102 [2022-04-06 14:29:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:55,890 INFO L225 Difference]: With dead ends: 8650 [2022-04-06 14:29:55,890 INFO L226 Difference]: Without dead ends: 5459 [2022-04-06 14:29:55,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=324, Invalid=2658, Unknown=4, NotChecked=436, Total=3422 [2022-04-06 14:29:55,894 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:29:55,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 83 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:29:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-04-06 14:30:01,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5373. [2022-04-06 14:30:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5373 states, 5368 states have (on average 1.1969076005961252) internal successors, (6425), 5368 states have internal predecessors, (6425), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 6429 transitions. [2022-04-06 14:30:01,541 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 6429 transitions. Word has length 102 [2022-04-06 14:30:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:30:01,541 INFO L478 AbstractCegarLoop]: Abstraction has 5373 states and 6429 transitions. [2022-04-06 14:30:01,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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) [2022-04-06 14:30:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 6429 transitions. [2022-04-06 14:30:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:30:01,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:30:01,545 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:30:01,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 14:30:01,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:01,756 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:30:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:30:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 39 times [2022-04-06 14:30:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1291500412] [2022-04-06 14:30:01,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:30:01,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:30:01,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:30:01,757 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 40 times [2022-04-06 14:30:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:30:01,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943411819] [2022-04-06 14:30:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:30:01,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:30:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:03,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:30:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 214 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 14:30:03,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:30:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943411819] [2022-04-06 14:30:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943411819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:30:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683322623] [2022-04-06 14:30:03,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:30:03,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:03,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:30:03,826 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:30:03,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 14:30:04,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:30:04,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:30:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:04,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:30:04,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:04,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:05,435 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:30:05,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 50 [2022-04-06 14:30:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 93 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-04-06 14:30:05,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:30:07,279 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_2641 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2641 (+ (mod aux_mod_main_~i~0_26 4294967296) |main_~#string_entrada~0.offset|))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2641) |c_main_~#vetor_vogais~0.base|))) (or (< aux_mod_main_~i~0_26 0) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< 2147483647 aux_mod_main_~i~0_26)))) is different from false [2022-04-06 14:30:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 106 proven. 14 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 14:30:07,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683322623] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:30:07,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:30:07,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 17] total 55 [2022-04-06 14:30:07,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:30:07,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1291500412] [2022-04-06 14:30:07,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1291500412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:30:07,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:30:07,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:30:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983051645] [2022-04-06 14:30:07,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:30:07,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:30:07,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:30:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2585, Unknown=1, NotChecked=104, Total=2970 [2022-04-06 14:30:07,638 INFO L87 Difference]: Start difference. First operand 5373 states and 6429 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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) [2022-04-06 14:30:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:30:18,082 INFO L93 Difference]: Finished difference Result 8065 states and 9648 transitions. [2022-04-06 14:30:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:30:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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 102 [2022-04-06 14:30:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:30:18,092 INFO L225 Difference]: With dead ends: 8065 [2022-04-06 14:30:18,092 INFO L226 Difference]: Without dead ends: 7890 [2022-04-06 14:30:18,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=541, Invalid=5314, Unknown=1, NotChecked=150, Total=6006 [2022-04-06 14:30:18,095 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 319 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 14:30:18,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 110 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 14:30:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2022-04-06 14:30:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 6012. [2022-04-06 14:30:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6007 states have (on average 1.1991010487764275) internal successors, (7203), 6007 states have internal predecessors, (7203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7207 transitions. [2022-04-06 14:30:24,652 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7207 transitions. Word has length 102 [2022-04-06 14:30:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:30:24,652 INFO L478 AbstractCegarLoop]: Abstraction has 6012 states and 7207 transitions. [2022-04-06 14:30:24,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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) [2022-04-06 14:30:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7207 transitions. [2022-04-06 14:30:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:30:24,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:30:24,658 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:30:24,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 14:30:24,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 14:30:24,877 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:30:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:30:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 41 times [2022-04-06 14:30:24,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:24,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047428602] [2022-04-06 14:30:24,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:30:24,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:30:24,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:30:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 42 times [2022-04-06 14:30:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:30:24,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939789149] [2022-04-06 14:30:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:30:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:30:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:30:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:30:25,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:30:25,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939789149] [2022-04-06 14:30:25,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939789149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:30:25,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967542918] [2022-04-06 14:30:25,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:30:25,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:25,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:30:25,408 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:30:25,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 14:30:26,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 14:30:26,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:26,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 14:30:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:26,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:30:26,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:26,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:30:27,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2022-04-06 14:30:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-04-06 14:30:27,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:30:27,738 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2708 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2708) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2708 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:30:27,840 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2708 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2708) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2708 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) (not (< (mod c_main_~i~0 4294967296) 10))) is different from false [2022-04-06 14:30:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 294 trivial. 10 not checked. [2022-04-06 14:30:27,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967542918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:30:27,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:30:27,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 14] total 37 [2022-04-06 14:30:27,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:30:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047428602] [2022-04-06 14:30:27,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047428602] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:30:27,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:30:27,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:30:27,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49721658] [2022-04-06 14:30:27,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:30:27,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:30:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:30:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1043, Unknown=2, NotChecked=134, Total=1332 [2022-04-06 14:30:27,855 INFO L87 Difference]: Start difference. First operand 6012 states and 7207 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-04-06 14:30:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:30:34,734 INFO L93 Difference]: Finished difference Result 8590 states and 10300 transitions. [2022-04-06 14:30:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:30:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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 102 [2022-04-06 14:30:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:30:34,741 INFO L225 Difference]: With dead ends: 8590 [2022-04-06 14:30:34,741 INFO L226 Difference]: Without dead ends: 5504 [2022-04-06 14:30:34,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=1842, Unknown=2, NotChecked=178, Total=2256 [2022-04-06 14:30:34,747 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:30:34,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 73 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:30:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-04-06 14:30:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 5402. [2022-04-06 14:30:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5397 states have (on average 1.194367241059848) internal successors, (6446), 5397 states have internal predecessors, (6446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 6450 transitions. [2022-04-06 14:30:40,716 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 6450 transitions. Word has length 102 [2022-04-06 14:30:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:30:40,716 INFO L478 AbstractCegarLoop]: Abstraction has 5402 states and 6450 transitions. [2022-04-06 14:30:40,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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) [2022-04-06 14:30:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 6450 transitions. [2022-04-06 14:30:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:30:40,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:30:40,720 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:30:40,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 14:30:40,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:40,926 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:30:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:30:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 43 times [2022-04-06 14:30:40,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:40,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842825196] [2022-04-06 14:30:40,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:30:40,927 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:30:40,927 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:30:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 44 times [2022-04-06 14:30:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:30:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003582516] [2022-04-06 14:30:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:30:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:30:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:41,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:30:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 14:30:41,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:30:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003582516] [2022-04-06 14:30:41,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003582516] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:30:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141511813] [2022-04-06 14:30:41,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:30:41,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:30:41,559 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:30:41,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 14:30:41,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:30:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 14:30:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:41,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:30:41,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:41,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:30:42,823 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:30:42,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:30:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 14:30:42,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:30:57,918 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2775 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2775) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2775 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:30:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-04-06 14:30:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141511813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:30:58,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:30:58,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 41 [2022-04-06 14:30:58,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:30:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842825196] [2022-04-06 14:30:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842825196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:30:58,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:30:58,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:30:58,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737523595] [2022-04-06 14:30:58,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:30:58,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:30:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:30:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1347, Unknown=8, NotChecked=76, Total=1640 [2022-04-06 14:30:58,043 INFO L87 Difference]: Start difference. First operand 5402 states and 6450 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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) [2022-04-06 14:31:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:31:05,355 INFO L93 Difference]: Finished difference Result 5700 states and 6819 transitions. [2022-04-06 14:31:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:31:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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 102 [2022-04-06 14:31:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:31:05,362 INFO L225 Difference]: With dead ends: 5700 [2022-04-06 14:31:05,362 INFO L226 Difference]: Without dead ends: 5547 [2022-04-06 14:31:05,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=298, Invalid=2454, Unknown=8, NotChecked=102, Total=2862 [2022-04-06 14:31:05,363 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 112 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:31:05,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 105 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:31:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2022-04-06 14:31:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 5492. [2022-04-06 14:31:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5487 states have (on average 1.1939128850009113) internal successors, (6551), 5487 states have internal predecessors, (6551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:31:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 6555 transitions. [2022-04-06 14:31:11,353 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 6555 transitions. Word has length 102 [2022-04-06 14:31:11,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:31:11,353 INFO L478 AbstractCegarLoop]: Abstraction has 5492 states and 6555 transitions. [2022-04-06 14:31:11,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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) [2022-04-06 14:31:11,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 6555 transitions. [2022-04-06 14:31:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:31:11,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:31:11,357 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:31:11,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 14:31:11,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 14:31:11,571 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:31:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:31:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 45 times [2022-04-06 14:31:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:11,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811886717] [2022-04-06 14:31:11,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:31:11,573 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:31:11,573 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:31:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 46 times [2022-04-06 14:31:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:31:11,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793636563] [2022-04-06 14:31:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:31:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:31:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:13,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:31:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:31:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:31:13,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793636563] [2022-04-06 14:31:13,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793636563] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:31:13,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952147745] [2022-04-06 14:31:13,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:31:13,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:31:13,177 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:31:13,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 14:31:13,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:31:13,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:31:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 14:31:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:31:13,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:31:13,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:13,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 14:31:14,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:31:15,486 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2841 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2841) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_2841 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:31:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-04-06 14:31:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952147745] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:31:15,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:31:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 15] total 51 [2022-04-06 14:31:15,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:31:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811886717] [2022-04-06 14:31:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811886717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:31:15,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:31:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:31:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446316376] [2022-04-06 14:31:15,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:31:15,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:31:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:31:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2158, Unknown=1, NotChecked=96, Total=2550 [2022-04-06 14:31:15,590 INFO L87 Difference]: Start difference. First operand 5492 states and 6555 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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) [2022-04-06 14:31:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:31:24,507 INFO L93 Difference]: Finished difference Result 7060 states and 8472 transitions. [2022-04-06 14:31:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:31:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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 102 [2022-04-06 14:31:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:31:24,514 INFO L225 Difference]: With dead ends: 7060 [2022-04-06 14:31:24,514 INFO L226 Difference]: Without dead ends: 6116 [2022-04-06 14:31:24,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=665, Invalid=5190, Unknown=1, NotChecked=150, Total=6006 [2022-04-06 14:31:24,522 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 347 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:31:24,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 76 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:31:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-04-06 14:31:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5424. [2022-04-06 14:31:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.1917327920280494) internal successors, (6458), 5419 states have internal predecessors, (6458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:31:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6462 transitions. [2022-04-06 14:31:30,477 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6462 transitions. Word has length 102 [2022-04-06 14:31:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:31:30,477 INFO L478 AbstractCegarLoop]: Abstraction has 5424 states and 6462 transitions. [2022-04-06 14:31:30,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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) [2022-04-06 14:31:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6462 transitions. [2022-04-06 14:31:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:31:30,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:31:30,481 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:31:30,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 14:31:30,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 14:31:30,698 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:31:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:31:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 47 times [2022-04-06 14:31:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:30,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527201325] [2022-04-06 14:31:30,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:31:30,700 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:31:30,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:31:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 48 times [2022-04-06 14:31:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:31:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861917389] [2022-04-06 14:31:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:31:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:31:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:31:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 14:31:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:31:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861917389] [2022-04-06 14:31:31,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861917389] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:31:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398755928] [2022-04-06 14:31:31,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:31:31,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:31:31,401 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:31:31,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 14:31:32,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:31:32,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:31:32,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:31:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:31:32,941 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-04-06 14:31:32,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2022-04-06 14:31:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 60 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 14:31:32,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:31:34,121 INFO L356 Elim1Store]: treesize reduction 116, result has 65.0 percent of original size [2022-04-06 14:31:34,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 140 treesize of output 266 [2022-04-06 14:31:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 14:31:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398755928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:31:34,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:31:34,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16] total 42 [2022-04-06 14:31:34,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:31:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527201325] [2022-04-06 14:31:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527201325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:31:34,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:31:34,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:31:34,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638011576] [2022-04-06 14:31:34,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:31:34,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:31:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:31:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:31:34,839 INFO L87 Difference]: Start difference. First operand 5424 states and 6462 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 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) [2022-04-06 14:31:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:31:42,040 INFO L93 Difference]: Finished difference Result 7481 states and 8920 transitions. [2022-04-06 14:31:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:31:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 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 102 [2022-04-06 14:31:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:31:42,046 INFO L225 Difference]: With dead ends: 7481 [2022-04-06 14:31:42,047 INFO L226 Difference]: Without dead ends: 5660 [2022-04-06 14:31:42,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:31:42,049 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:31:42,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 81 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:31:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5660 states. [2022-04-06 14:31:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5660 to 5499. [2022-04-06 14:31:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 5494 states have (on average 1.188023298143429) internal successors, (6527), 5494 states have internal predecessors, (6527), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:31:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6531 transitions. [2022-04-06 14:31:48,193 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6531 transitions. Word has length 102 [2022-04-06 14:31:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:31:48,193 INFO L478 AbstractCegarLoop]: Abstraction has 5499 states and 6531 transitions. [2022-04-06 14:31:48,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 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) [2022-04-06 14:31:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6531 transitions. [2022-04-06 14:31:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:31:48,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:31:48,219 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:31:48,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 14:31:48,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:48,425 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:31:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:31:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 49 times [2022-04-06 14:31:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:48,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640530742] [2022-04-06 14:31:48,427 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:31:48,427 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:31:48,427 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:31:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 50 times [2022-04-06 14:31:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:31:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915634369] [2022-04-06 14:31:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:31:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:31:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:31:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 14:31:48,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:31:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915634369] [2022-04-06 14:31:48,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915634369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:31:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412125824] [2022-04-06 14:31:48,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:31:48,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:31:48,884 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:31:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 14:31:49,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:31:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:31:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 14:31:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:31:49,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:31:49,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:49,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:31:50,383 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:31:50,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:31:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 101 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-04-06 14:31:50,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:11,632 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2962 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2962 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2962) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 14:32:11,725 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2962 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2962 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2962) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) (not (< (mod c_main_~i~0 4294967296) 10))) is different from false [2022-04-06 14:32:11,735 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_2962 (Array Int Int))) (let ((.cse1 (select v_ArrVal_2962 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_2962) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))))))) is different from false [2022-04-06 14:32:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 110 proven. 11 refuted. 0 times theorem prover too weak. 178 trivial. 43 not checked. [2022-04-06 14:32:12,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412125824] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:12,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:12,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 25] total 56 [2022-04-06 14:32:12,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640530742] [2022-04-06 14:32:12,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640530742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:12,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:12,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:32:12,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564967013] [2022-04-06 14:32:12,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:12,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:32:12,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:32:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2328, Unknown=14, NotChecked=312, Total=3080 [2022-04-06 14:32:12,050 INFO L87 Difference]: Start difference. First operand 5499 states and 6531 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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) [2022-04-06 14:32:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:18,936 INFO L93 Difference]: Finished difference Result 8115 states and 9646 transitions. [2022-04-06 14:32:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:32:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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 102 [2022-04-06 14:32:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:18,944 INFO L225 Difference]: With dead ends: 8115 [2022-04-06 14:32:18,944 INFO L226 Difference]: Without dead ends: 5176 [2022-04-06 14:32:18,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=526, Invalid=3632, Unknown=14, NotChecked=384, Total=4556 [2022-04-06 14:32:18,962 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 210 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:18,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 85 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:32:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2022-04-06 14:32:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4970. [2022-04-06 14:32:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4965 states have (on average 1.1871097683786505) internal successors, (5894), 4965 states have internal predecessors, (5894), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-04-06 14:32:24,629 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-04-06 14:32:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:24,629 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-04-06 14:32:24,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 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) [2022-04-06 14:32:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-04-06 14:32:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:32:24,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:24,634 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:24,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:24,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:24,852 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 51 times [2022-04-06 14:32:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:24,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472566314] [2022-04-06 14:32:24,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:24,854 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:24,854 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 52 times [2022-04-06 14:32:24,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:24,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915309515] [2022-04-06 14:32:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:24,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 14:32:25,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915309515] [2022-04-06 14:32:25,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915309515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368385205] [2022-04-06 14:32:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:25,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:25,503 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:25,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 14:32:25,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:25,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 14:32:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:25,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:32:25,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:25,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:25,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:25,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:25,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:26,876 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:32:26,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 50 [2022-04-06 14:32:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 46 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 14:32:26,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:28,212 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_3029 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3029 (+ (mod aux_mod_main_~i~0_26 4294967296) |main_~#string_entrada~0.offset|))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3029) |c_main_~#vetor_vogais~0.base|))) (or (< aux_mod_main_~i~0_26 0) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< 2147483647 aux_mod_main_~i~0_26)))) is different from false [2022-04-06 14:32:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 14:32:28,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368385205] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:28,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:28,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2022-04-06 14:32:28,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:28,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472566314] [2022-04-06 14:32:28,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472566314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:28,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:28,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:32:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807234068] [2022-04-06 14:32:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:28,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:32:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:32:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1397, Unknown=1, NotChecked=76, Total=1640 [2022-04-06 14:32:28,679 INFO L87 Difference]: Start difference. First operand 4970 states and 5898 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2022-04-06 14:32:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:35,881 INFO L93 Difference]: Finished difference Result 5272 states and 6271 transitions. [2022-04-06 14:32:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:32:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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 102 [2022-04-06 14:32:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:35,887 INFO L225 Difference]: With dead ends: 5272 [2022-04-06 14:32:35,887 INFO L226 Difference]: Without dead ends: 5104 [2022-04-06 14:32:35,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=261, Invalid=2604, Unknown=1, NotChecked=104, Total=2970 [2022-04-06 14:32:35,888 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 126 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:35,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 105 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:32:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2022-04-06 14:32:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4970. [2022-04-06 14:32:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4965 states have (on average 1.1871097683786505) internal successors, (5894), 4965 states have internal predecessors, (5894), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-04-06 14:32:41,562 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-04-06 14:32:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:41,562 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-04-06 14:32:41,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2022-04-06 14:32:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-04-06 14:32:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:32:41,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:41,566 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:41,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:41,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:41,785 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 53 times [2022-04-06 14:32:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390389757] [2022-04-06 14:32:41,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:41,786 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:41,786 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 54 times [2022-04-06 14:32:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:41,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986403044] [2022-04-06 14:32:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:42,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 14:32:42,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986403044] [2022-04-06 14:32:42,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986403044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234948784] [2022-04-06 14:32:42,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:42,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:42,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:42,373 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:42,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 14:32:43,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 14:32:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:43,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 14:32:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:43,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:32:43,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:43,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:32:44,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 33 [2022-04-06 14:32:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 32 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-04-06 14:32:44,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:45,097 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3095 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3095) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_3095 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0)))) is different from false [2022-04-06 14:32:45,449 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((v_ArrVal_3095 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3095) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_3095 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0))))) is different from false [2022-04-06 14:32:45,461 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((v_ArrVal_3095 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3095) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_3095 |c_main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 |c_main_~#vetor_vogais~0.offset|)) (< (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse0))))) is different from false [2022-04-06 14:32:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 43 proven. 9 refuted. 0 times theorem prover too weak. 236 trivial. 54 not checked. [2022-04-06 14:32:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234948784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:45,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:45,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 21] total 50 [2022-04-06 14:32:45,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390389757] [2022-04-06 14:32:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390389757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:45,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:45,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:32:45,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6919678] [2022-04-06 14:32:45,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:45,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:32:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:32:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1873, Unknown=3, NotChecked=276, Total=2450 [2022-04-06 14:32:45,553 INFO L87 Difference]: Start difference. First operand 4970 states and 5898 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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) [2022-04-06 14:32:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:52,649 INFO L93 Difference]: Finished difference Result 5272 states and 6274 transitions. [2022-04-06 14:32:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:32:52,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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 102 [2022-04-06 14:32:52,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:52,654 INFO L225 Difference]: With dead ends: 5272 [2022-04-06 14:32:52,654 INFO L226 Difference]: Without dead ends: 5062 [2022-04-06 14:32:52,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=389, Invalid=3160, Unknown=3, NotChecked=354, Total=3906 [2022-04-06 14:32:52,655 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 123 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:52,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 107 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:32:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2022-04-06 14:32:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4970. [2022-04-06 14:32:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4965 states have (on average 1.1871097683786505) internal successors, (5894), 4965 states have internal predecessors, (5894), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-04-06 14:32:58,288 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-04-06 14:32:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:58,288 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-04-06 14:32:58,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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) [2022-04-06 14:32:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-04-06 14:32:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:32:58,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:58,292 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:58,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 14:32:58,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 14:32:58,498 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 55 times [2022-04-06 14:32:58,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:58,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474309630] [2022-04-06 14:32:58,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:58,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:58,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 56 times [2022-04-06 14:32:58,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:58,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208183772] [2022-04-06 14:32:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:58,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 14:32:59,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208183772] [2022-04-06 14:32:59,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208183772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629674482] [2022-04-06 14:32:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:59,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:59,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:59,036 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:32:59,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 14:32:59,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:59,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:32:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:59,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:32:59,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:32:59,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:00,326 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:33:00,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2022-04-06 14:33:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 14:33:00,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:15,548 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_3161 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3161 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3161) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|))))) is different from false [2022-04-06 14:33:15,659 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_3161 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3161 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3161) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|)))))) is different from false [2022-04-06 14:33:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 253 trivial. 10 not checked. [2022-04-06 14:33:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629674482] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:15,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:15,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 47 [2022-04-06 14:33:15,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474309630] [2022-04-06 14:33:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474309630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:15,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:15,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:33:15,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661361420] [2022-04-06 14:33:15,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:15,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:33:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:33:15,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1687, Unknown=11, NotChecked=174, Total=2162 [2022-04-06 14:33:15,679 INFO L87 Difference]: Start difference. First operand 4970 states and 5898 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2022-04-06 14:33:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:22,562 INFO L93 Difference]: Finished difference Result 5200 states and 6188 transitions. [2022-04-06 14:33:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:33:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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 102 [2022-04-06 14:33:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:22,568 INFO L225 Difference]: With dead ends: 5200 [2022-04-06 14:33:22,568 INFO L226 Difference]: Without dead ends: 5005 [2022-04-06 14:33:22,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=395, Invalid=3024, Unknown=11, NotChecked=230, Total=3660 [2022-04-06 14:33:22,569 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:22,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 87 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:33:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2022-04-06 14:33:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 4970. [2022-04-06 14:33:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4970 states, 4965 states have (on average 1.1871097683786505) internal successors, (5894), 4965 states have internal predecessors, (5894), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-04-06 14:33:28,235 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-04-06 14:33:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:28,235 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-04-06 14:33:28,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2022-04-06 14:33:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-04-06 14:33:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:33:28,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:28,240 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:28,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 14:33:28,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 14:33:28,458 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 57 times [2022-04-06 14:33:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:28,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195793501] [2022-04-06 14:33:28,459 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:28,459 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:28,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 58 times [2022-04-06 14:33:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313211850] [2022-04-06 14:33:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:29,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 14:33:29,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:29,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313211850] [2022-04-06 14:33:29,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313211850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:29,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367008829] [2022-04-06 14:33:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:33:29,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:29,186 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:33:29,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 14:33:29,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:33:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 14:33:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:29,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:33:29,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:29,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:30,639 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-04-06 14:33:30,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 50 [2022-04-06 14:33:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 62 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-04-06 14:33:30,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:32,507 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_3227 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3227 (+ (mod aux_mod_main_~i~0_26 4294967296) |main_~#string_entrada~0.offset|))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3227) |c_main_~#vetor_vogais~0.base|))) (or (< aux_mod_main_~i~0_26 0) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< 2147483647 aux_mod_main_~i~0_26)))) is different from false [2022-04-06 14:33:32,819 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|main_~#string_entrada~0.offset| Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_3227 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3227 (+ (mod aux_mod_main_~i~0_26 4294967296) |main_~#string_entrada~0.offset|))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3227) |c_main_~#vetor_vogais~0.base|))) (or (< aux_mod_main_~i~0_26 0) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< 2147483647 aux_mod_main_~i~0_26)))) (not (< (mod c_main_~i~0 4294967296) 10))) is different from false [2022-04-06 14:33:32,845 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|main_~#string_entrada~0.offset| Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_3227 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3227 (+ (mod aux_mod_main_~i~0_26 4294967296) |main_~#string_entrada~0.offset|))) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3227) |c_main_~#vetor_vogais~0.base|))) (or (< aux_mod_main_~i~0_26 0) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< 2147483647 aux_mod_main_~i~0_26)))) (not (< (mod (+ c_main_~i~0 1) 4294967296) 10))) is different from false [2022-04-06 14:33:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 217 trivial. 43 not checked. [2022-04-06 14:33:33,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367008829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:33,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:33,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 20] total 45 [2022-04-06 14:33:33,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:33,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195793501] [2022-04-06 14:33:33,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195793501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:33,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:33,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:33:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748884990] [2022-04-06 14:33:33,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:33,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:33:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:33,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:33:33,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1512, Unknown=3, NotChecked=246, Total=1980 [2022-04-06 14:33:33,414 INFO L87 Difference]: Start difference. First operand 4970 states and 5898 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-04-06 14:33:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:40,528 INFO L93 Difference]: Finished difference Result 8289 states and 9840 transitions. [2022-04-06 14:33:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:33:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 102 [2022-04-06 14:33:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:40,534 INFO L225 Difference]: With dead ends: 8289 [2022-04-06 14:33:40,534 INFO L226 Difference]: Without dead ends: 5264 [2022-04-06 14:33:40,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=289, Invalid=2476, Unknown=3, NotChecked=312, Total=3080 [2022-04-06 14:33:40,538 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:40,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:33:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2022-04-06 14:33:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 5105. [2022-04-06 14:33:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5105 states, 5100 states have (on average 1.1813725490196079) internal successors, (6025), 5100 states have internal predecessors, (6025), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5105 states to 5105 states and 6029 transitions. [2022-04-06 14:33:46,445 INFO L78 Accepts]: Start accepts. Automaton has 5105 states and 6029 transitions. Word has length 102 [2022-04-06 14:33:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:46,445 INFO L478 AbstractCegarLoop]: Abstraction has 5105 states and 6029 transitions. [2022-04-06 14:33:46,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-04-06 14:33:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5105 states and 6029 transitions. [2022-04-06 14:33:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:33:46,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:46,449 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:46,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 14:33:46,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:46,652 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 59 times [2022-04-06 14:33:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:46,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608434459] [2022-04-06 14:33:46,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:46,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:33:46,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:33:46,654 INFO L85 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 60 times [2022-04-06 14:33:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:46,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059082721] [2022-04-06 14:33:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 14:33:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059082721] [2022-04-06 14:33:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059082721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:33:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610745357] [2022-04-06 14:33:47,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:33:47,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:33:47,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:47,389 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:33:47,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 14:33:48,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 14:33:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:33:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 14:33:48,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:33:48,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:33:48,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:48,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:33:49,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:33:49,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 36 [2022-04-06 14:33:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-04-06 14:33:49,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:33:54,977 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3294 (Array Int Int)) (aux_mod_aux_mod_main_~j~0_26_43 Int) (|main_~#string_entrada~0.offset| Int) (aux_div_aux_mod_main_~j~0_26_43 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_26_43 4294967296) aux_mod_aux_mod_main_~j~0_26_43)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3294) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_3294 |main_~#string_entrada~0.offset|))) (or (<= 9 .cse0) (< aux_mod_aux_mod_main_~j~0_26_43 8) (<= 4294967296 aux_mod_aux_mod_main_~j~0_26_43) (< .cse1 (select .cse2 |c_main_~#vetor_vogais~0.offset|)) (< .cse0 1) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| (mod (+ 4294967295 aux_mod_aux_mod_main_~j~0_26_43) 4294967296))) .cse1)))) is different from false [2022-04-06 14:33:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-04-06 14:33:56,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610745357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:56,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:56,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 12] total 34 [2022-04-06 14:33:56,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608434459] [2022-04-06 14:33:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608434459] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:33:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043186537] [2022-04-06 14:33:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:56,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:33:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:33:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=911, Unknown=2, NotChecked=62, Total=1122 [2022-04-06 14:33:56,176 INFO L87 Difference]: Start difference. First operand 5105 states and 6029 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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) [2022-04-06 14:34:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:03,461 INFO L93 Difference]: Finished difference Result 5367 states and 6356 transitions. [2022-04-06 14:34:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:34:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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 102 [2022-04-06 14:34:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:03,468 INFO L225 Difference]: With dead ends: 5367 [2022-04-06 14:34:03,468 INFO L226 Difference]: Without dead ends: 5169 [2022-04-06 14:34:03,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=269, Invalid=1803, Unknown=2, NotChecked=88, Total=2162 [2022-04-06 14:34:03,470 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 132 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:03,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 93 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:34:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2022-04-06 14:34:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 5105. [2022-04-06 14:34:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5105 states, 5100 states have (on average 1.1813725490196079) internal successors, (6025), 5100 states have internal predecessors, (6025), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:34:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5105 states to 5105 states and 6029 transitions. [2022-04-06 14:34:09,392 INFO L78 Accepts]: Start accepts. Automaton has 5105 states and 6029 transitions. Word has length 102 [2022-04-06 14:34:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:09,392 INFO L478 AbstractCegarLoop]: Abstraction has 5105 states and 6029 transitions. [2022-04-06 14:34:09,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 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) [2022-04-06 14:34:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5105 states and 6029 transitions. [2022-04-06 14:34:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:34:09,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:09,397 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:09,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 14:34:09,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:09,603 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1904666614, now seen corresponding path program 61 times [2022-04-06 14:34:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:09,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [374268579] [2022-04-06 14:34:09,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:09,605 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:09,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1904666614, now seen corresponding path program 62 times [2022-04-06 14:34:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:09,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358556335] [2022-04-06 14:34:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:10,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 14:34:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:10,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358556335] [2022-04-06 14:34:10,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358556335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:10,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185513888] [2022-04-06 14:34:10,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:10,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:10,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:10,423 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 14:34:10,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 14:34:10,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:10,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 14:34:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:10,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:34:10,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:34:10,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:34:10,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:34:10,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:34:10,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 14:34:10,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23