/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-b030c9e [2022-03-20 12:46:50,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:46:50,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:46:50,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:46:50,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:46:50,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:46:50,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:46:50,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:46:50,427 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:46:50,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:46:50,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:46:50,430 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:46:50,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:46:50,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:46:50,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:46:50,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:46:50,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:46:50,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:46:50,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:50,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:46:50,432 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:46:50,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:46:50,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:46:50,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:46:50,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:46:50,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:46:50,655 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:46:50,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-03-20 12:46:50,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8524d69/e0f06f88dfac42239f4d59dfa1399c75/FLAG3805c7c0a [2022-03-20 12:46:51,067 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:46:51,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-03-20 12:46:51,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8524d69/e0f06f88dfac42239f4d59dfa1399c75/FLAG3805c7c0a [2022-03-20 12:46:51,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d8524d69/e0f06f88dfac42239f4d59dfa1399c75 [2022-03-20 12:46:51,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:46:51,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:46:51,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:51,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:46:51,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:46:51,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669380a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51, skipping insertion in model container [2022-03-20 12:46:51,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:46:51,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:46:51,627 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] [2022-03-20 12:46:51,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:51,646 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:46:51,656 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] [2022-03-20 12:46:51,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:51,676 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:46:51,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51 WrapperNode [2022-03-20 12:46:51,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:51,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:46:51,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:46:51,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:46:51,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:46:51,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:46:51,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:46:51,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:46:51,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (1/1) ... [2022-03-20 12:46:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:51,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:51,739 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) [2022-03-20 12:46:51,748 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 [2022-03-20 12:46:51,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:46:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:46:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:46:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:46:51,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:46:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:46:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:46:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 12:46:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:46:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:46:51,842 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:46:51,843 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:46:51,974 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:46:51,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:46:51,979 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 12:46:51,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:51 BoogieIcfgContainer [2022-03-20 12:46:51,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:46:51,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:46:51,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:46:51,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:46:51,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:46:51" (1/3) ... [2022-03-20 12:46:51,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d6a71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:51, skipping insertion in model container [2022-03-20 12:46:51,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:51" (2/3) ... [2022-03-20 12:46:51,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d6a71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:51, skipping insertion in model container [2022-03-20 12:46:51,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:51" (3/3) ... [2022-03-20 12:46:51,996 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-03-20 12:46:52,008 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:46:52,008 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:46:52,049 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:46:52,054 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 [2022-03-20 12:46:52,054 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:46:52,065 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) [2022-03-20 12:46:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:46:52,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:52,071 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:52,072 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-03-20 12:46:52,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:52,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1881387833] [2022-03-20 12:46:52,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 2 times [2022-03-20 12:46:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942985747] [2022-03-20 12:46:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942985747] [2022-03-20 12:46:52,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942985747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:52,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:52,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:52,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:52,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1881387833] [2022-03-20 12:46:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1881387833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:52,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:52,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618268471] [2022-03-20 12:46:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:52,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:46:52,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:46:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:46:52,335 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) [2022-03-20 12:46:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:52,389 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-03-20 12:46:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:46:52,391 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 [2022-03-20 12:46:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:52,399 INFO L225 Difference]: With dead ends: 64 [2022-03-20 12:46:52,400 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 12:46:52,402 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 [2022-03-20 12:46:52,405 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 [2022-03-20 12:46:52,406 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] [2022-03-20 12:46:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 12:46:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 12:46:52,439 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) [2022-03-20 12:46:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-20 12:46:52,441 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-03-20 12:46:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:52,441 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-20 12:46:52,442 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) [2022-03-20 12:46:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-20 12:46:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 12:46:52,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:52,443 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:52,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:46:52,444 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:52,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-03-20 12:46:52,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:52,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630912989] [2022-03-20 12:46:52,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 2 times [2022-03-20 12:46:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:52,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172705632] [2022-03-20 12:46:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:52,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:52,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172705632] [2022-03-20 12:46:52,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172705632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:52,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:52,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:46:52,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630912989] [2022-03-20 12:46:52,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630912989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:52,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:52,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:46:52,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470612320] [2022-03-20 12:46:52,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:52,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:46:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:46:52,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:46:52,577 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) [2022-03-20 12:46:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:52,668 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-03-20 12:46:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:46:52,670 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 [2022-03-20 12:46:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:52,678 INFO L225 Difference]: With dead ends: 65 [2022-03-20 12:46:52,678 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 12:46:52,678 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 [2022-03-20 12:46:52,679 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 12:46:52,679 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] [2022-03-20 12:46:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 12:46:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-03-20 12:46:52,685 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) [2022-03-20 12:46:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 12:46:52,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-03-20 12:46:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:52,686 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 12:46:52,686 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) [2022-03-20 12:46:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 12:46:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:46:52,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:52,686 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] [2022-03-20 12:46:52,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:46:52,687 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-03-20 12:46:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:52,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452235991] [2022-03-20 12:46:52,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:52,703 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:52,703 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 2 times [2022-03-20 12:46:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:52,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982451061] [2022-03-20 12:46:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:52,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982451061] [2022-03-20 12:46:52,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982451061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258802440] [2022-03-20 12:46:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:52,788 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) [2022-03-20 12:46:52,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:46:52,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 12:46:52,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:52,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 12:46:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:46:52,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 12:46:52,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258802440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:52,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 12:46:52,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-20 12:46:52,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:52,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452235991] [2022-03-20 12:46:52,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452235991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:52,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:52,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438867428] [2022-03-20 12:46:52,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:52,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:46:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:46:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 12:46:52,976 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) [2022-03-20 12:46:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:53,000 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 12:46:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:46:53,001 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 [2022-03-20 12:46:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:53,002 INFO L225 Difference]: With dead ends: 54 [2022-03-20 12:46:53,002 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 12:46:53,002 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 [2022-03-20 12:46:53,003 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:53,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:46:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 12:46:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-03-20 12:46:53,008 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) [2022-03-20 12:46:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-03-20 12:46:53,009 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-03-20 12:46:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:53,009 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-03-20 12:46:53,009 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) [2022-03-20 12:46:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-03-20 12:46:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:46:53,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:53,010 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] [2022-03-20 12:46:53,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:53,223 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 [2022-03-20 12:46:53,224 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2022-03-20 12:46:53,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:53,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632562090] [2022-03-20 12:46:53,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:53,226 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:53,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 2 times [2022-03-20 12:46:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:53,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623022331] [2022-03-20 12:46:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:53,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:46:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623022331] [2022-03-20 12:46:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623022331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987471521] [2022-03-20 12:46:53,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:53,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:53,300 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) [2022-03-20 12:46:53,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:46:53,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:46:53,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 12:46:53,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987471521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:53,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 12:46:53,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 12:46:53,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:53,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632562090] [2022-03-20 12:46:53,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632562090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:53,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:53,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:46:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992974295] [2022-03-20 12:46:53,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:53,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:46:53,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:53,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:46:53,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 12:46:53,434 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) [2022-03-20 12:46:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:53,494 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-03-20 12:46:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:46:53,495 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 [2022-03-20 12:46:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:53,496 INFO L225 Difference]: With dead ends: 99 [2022-03-20 12:46:53,496 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 12:46:53,496 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 [2022-03-20 12:46:53,497 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 [2022-03-20 12:46:53,497 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] [2022-03-20 12:46:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 12:46:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-03-20 12:46:53,509 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) [2022-03-20 12:46:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-03-20 12:46:53,510 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-03-20 12:46:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:53,510 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-03-20 12:46:53,510 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) [2022-03-20 12:46:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-03-20 12:46:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 12:46:53,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:53,511 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] [2022-03-20 12:46:53,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 12:46:53,711 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 [2022-03-20 12:46:53,712 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2022-03-20 12:46:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:53,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567479284] [2022-03-20 12:46:53,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:53,714 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:53,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 2 times [2022-03-20 12:46:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:53,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681279954] [2022-03-20 12:46:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:53,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:46:53,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681279954] [2022-03-20 12:46:53,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681279954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927805740] [2022-03-20 12:46:53,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:53,782 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) [2022-03-20 12:46:53,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:46:53,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:46:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:46:54,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:54,193 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:54,194 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 [2022-03-20 12:46:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:46:54,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927805740] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:54,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 12:46:54,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 17 [2022-03-20 12:46:54,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:54,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567479284] [2022-03-20 12:46:54,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567479284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:54,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:54,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:46:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30180720] [2022-03-20 12:46:54,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:54,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:46:54,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:46:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-20 12:46:54,244 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) [2022-03-20 12:46:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:54,352 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-20 12:46:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:46:54,353 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 [2022-03-20 12:46:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:54,353 INFO L225 Difference]: With dead ends: 66 [2022-03-20 12:46:54,353 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 12:46:54,354 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 [2022-03-20 12:46:54,354 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 [2022-03-20 12:46:54,355 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] [2022-03-20 12:46:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 12:46:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 12:46:54,360 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) [2022-03-20 12:46:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-20 12:46:54,361 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-03-20 12:46:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:54,361 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-20 12:46:54,361 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) [2022-03-20 12:46:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-20 12:46:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:46:54,362 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:54,362 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] [2022-03-20 12:46:54,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:54,585 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 [2022-03-20 12:46:54,586 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:54,586 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2022-03-20 12:46:54,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:54,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938372407] [2022-03-20 12:46:54,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:54,588 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:54,588 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 2 times [2022-03-20 12:46:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008320595] [2022-03-20 12:46:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:54,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:46:54,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008320595] [2022-03-20 12:46:54,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008320595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558226228] [2022-03-20 12:46:54,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:54,656 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) [2022-03-20 12:46:54,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:46:54,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:46:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:54,840 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 [2022-03-20 12:46:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 12:46:54,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:54,945 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:54,945 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 [2022-03-20 12:46:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:46:54,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558226228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:54,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:54,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-03-20 12:46:54,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938372407] [2022-03-20 12:46:54,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938372407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:54,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:54,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:46:54,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635244709] [2022-03-20 12:46:54,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:54,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:46:54,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:46:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:46:54,977 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) [2022-03-20 12:46:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:55,093 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-03-20 12:46:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:46:55,093 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 [2022-03-20 12:46:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:55,096 INFO L225 Difference]: With dead ends: 130 [2022-03-20 12:46:55,096 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 12:46:55,096 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 [2022-03-20 12:46:55,098 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-20 12:46:55,098 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] [2022-03-20 12:46:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 12:46:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-03-20 12:46:55,124 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) [2022-03-20 12:46:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-03-20 12:46:55,124 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-03-20 12:46:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:55,125 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-03-20 12:46:55,125 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) [2022-03-20 12:46:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-03-20 12:46:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 12:46:55,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:55,126 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] [2022-03-20 12:46:55,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:55,339 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 [2022-03-20 12:46:55,339 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 3 times [2022-03-20 12:46:55,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:55,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338729752] [2022-03-20 12:46:55,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:55,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:55,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 4 times [2022-03-20 12:46:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:55,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120663684] [2022-03-20 12:46:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:55,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:46:55,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120663684] [2022-03-20 12:46:55,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120663684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157837039] [2022-03-20 12:46:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:55,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:55,400 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) [2022-03-20 12:46:55,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:46:55,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:55,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:46:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:55,585 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 [2022-03-20 12:46:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 12:46:55,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:55,731 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:55,732 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 [2022-03-20 12:46:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 12:46:55,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157837039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:55,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:55,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2022-03-20 12:46:55,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338729752] [2022-03-20 12:46:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338729752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:55,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:55,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157344364] [2022-03-20 12:46:55,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:55,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:46:55,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:46:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:46:55,770 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) [2022-03-20 12:46:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:55,925 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2022-03-20 12:46:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:46:55,925 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 [2022-03-20 12:46:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:55,927 INFO L225 Difference]: With dead ends: 157 [2022-03-20 12:46:55,927 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 12:46:55,928 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 [2022-03-20 12:46:55,928 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 [2022-03-20 12:46:55,929 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] [2022-03-20 12:46:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 12:46:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 48. [2022-03-20 12:46:55,947 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) [2022-03-20 12:46:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-20 12:46:55,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 31 [2022-03-20 12:46:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:55,948 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-20 12:46:55,948 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) [2022-03-20 12:46:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-20 12:46:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 12:46:55,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:55,953 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] [2022-03-20 12:46:55,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 12:46:56,167 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 [2022-03-20 12:46:56,167 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 5 times [2022-03-20 12:46:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049325025] [2022-03-20 12:46:56,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:56,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:56,170 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 6 times [2022-03-20 12:46:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62796241] [2022-03-20 12:46:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:56,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:56,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:46:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62796241] [2022-03-20 12:46:56,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62796241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103718137] [2022-03-20 12:46:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:56,247 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) [2022-03-20 12:46:56,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:46:56,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:56,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:56,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:46:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:56,449 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 [2022-03-20 12:46:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 12:46:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:56,566 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:56,566 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 [2022-03-20 12:46:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 12:46:56,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103718137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:56,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:56,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-03-20 12:46:56,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:56,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049325025] [2022-03-20 12:46:56,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049325025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:56,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:56,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:46:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210709875] [2022-03-20 12:46:56,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:56,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:46:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:46:56,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:46:56,601 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) [2022-03-20 12:46:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:56,808 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2022-03-20 12:46:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:46:56,808 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 [2022-03-20 12:46:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:56,809 INFO L225 Difference]: With dead ends: 184 [2022-03-20 12:46:56,809 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 12:46:56,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:46:56,810 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:56,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 68 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 12:46:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 50. [2022-03-20 12:46:56,818 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) [2022-03-20 12:46:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-20 12:46:56,818 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 33 [2022-03-20 12:46:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:56,818 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-20 12:46:56,819 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) [2022-03-20 12:46:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-20 12:46:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 12:46:56,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:56,819 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] [2022-03-20 12:46:56,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 12:46:57,033 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 [2022-03-20 12:46:57,033 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:57,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 7 times [2022-03-20 12:46:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132524390] [2022-03-20 12:46:57,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:57,036 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:57,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 8 times [2022-03-20 12:46:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:57,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745335353] [2022-03-20 12:46:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:57,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:46:57,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745335353] [2022-03-20 12:46:57,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745335353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:57,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420589527] [2022-03-20 12:46:57,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:57,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:57,122 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) [2022-03-20 12:46:57,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:46:57,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:46:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:57,314 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 [2022-03-20 12:46:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 12:46:57,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:57,434 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:57,434 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 [2022-03-20 12:46:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 12:46:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420589527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:57,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:57,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-03-20 12:46:57,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132524390] [2022-03-20 12:46:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132524390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:57,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:57,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:46:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947929087] [2022-03-20 12:46:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:57,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:46:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:46:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:46:57,469 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) [2022-03-20 12:46:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:57,765 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-03-20 12:46:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:46:57,765 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 [2022-03-20 12:46:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:57,766 INFO L225 Difference]: With dead ends: 211 [2022-03-20 12:46:57,766 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 12:46:57,767 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 [2022-03-20 12:46:57,767 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 [2022-03-20 12:46:57,767 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] [2022-03-20 12:46:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 12:46:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 52. [2022-03-20 12:46:57,777 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) [2022-03-20 12:46:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-20 12:46:57,777 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 35 [2022-03-20 12:46:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:57,778 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-20 12:46:57,778 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) [2022-03-20 12:46:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-20 12:46:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 12:46:57,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:57,778 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] [2022-03-20 12:46:57,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:57,995 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 [2022-03-20 12:46:57,996 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 9 times [2022-03-20 12:46:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:57,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884803069] [2022-03-20 12:46:57,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:57,997 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:57,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 10 times [2022-03-20 12:46:57,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:57,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970081475] [2022-03-20 12:46:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:57,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:46:58,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970081475] [2022-03-20 12:46:58,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970081475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086282714] [2022-03-20 12:46:58,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:58,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:58,078 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) [2022-03-20 12:46:58,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:46:58,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:58,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:46:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:58,268 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 [2022-03-20 12:46:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 12:46:58,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:58,394 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:58,395 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 [2022-03-20 12:46:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 12:46:58,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086282714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:58,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:58,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-03-20 12:46:58,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:58,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884803069] [2022-03-20 12:46:58,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884803069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:58,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:58,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:46:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893531309] [2022-03-20 12:46:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:58,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:46:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:46:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:46:58,437 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) [2022-03-20 12:46:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:58,805 INFO L93 Difference]: Finished difference Result 238 states and 327 transitions. [2022-03-20 12:46:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:46:58,805 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 [2022-03-20 12:46:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:58,806 INFO L225 Difference]: With dead ends: 238 [2022-03-20 12:46:58,806 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 12:46:58,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-20 12:46:58,807 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 [2022-03-20 12:46:58,807 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] [2022-03-20 12:46:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 12:46:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 54. [2022-03-20 12:46:58,817 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) [2022-03-20 12:46:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-03-20 12:46:58,817 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2022-03-20 12:46:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:58,818 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-03-20 12:46:58,818 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) [2022-03-20 12:46:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-03-20 12:46:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 12:46:58,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:58,818 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] [2022-03-20 12:46:58,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:59,035 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 [2022-03-20 12:46:59,036 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 11 times [2022-03-20 12:46:59,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:59,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752593069] [2022-03-20 12:46:59,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:59,037 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:59,037 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:59,037 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 12 times [2022-03-20 12:46:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:59,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273750375] [2022-03-20 12:46:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:59,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:46:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:59,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273750375] [2022-03-20 12:46:59,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273750375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:59,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353012414] [2022-03-20 12:46:59,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:59,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:59,139 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) [2022-03-20 12:46:59,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:46:59,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:46:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:46:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:59,362 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 [2022-03-20 12:46:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 12:46:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:59,473 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:46:59,474 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 [2022-03-20 12:46:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 12:46:59,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353012414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:59,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:59,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-03-20 12:46:59,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:59,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752593069] [2022-03-20 12:46:59,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752593069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:59,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:59,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:46:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851401020] [2022-03-20 12:46:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:59,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:46:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:46:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:46:59,517 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) [2022-03-20 12:46:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:59,980 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-03-20 12:46:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:46:59,981 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 [2022-03-20 12:46:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:59,982 INFO L225 Difference]: With dead ends: 265 [2022-03-20 12:46:59,982 INFO L226 Difference]: Without dead ends: 230 [2022-03-20 12:46:59,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:46:59,983 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 [2022-03-20 12:46:59,983 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] [2022-03-20 12:46:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-20 12:46:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 56. [2022-03-20 12:46:59,993 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) [2022-03-20 12:46:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-20 12:46:59,993 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-03-20 12:46:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:59,994 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-20 12:46:59,994 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) [2022-03-20 12:46:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-20 12:46:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 12:46:59,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:59,994 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] [2022-03-20 12:47:00,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 12:47:00,207 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 [2022-03-20 12:47:00,207 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 13 times [2022-03-20 12:47:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987946067] [2022-03-20 12:47:00,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:00,209 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:00,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 14 times [2022-03-20 12:47:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:00,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113458800] [2022-03-20 12:47:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:00,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:47:00,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:00,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113458800] [2022-03-20 12:47:00,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113458800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:00,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208666643] [2022-03-20 12:47:00,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:00,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:00,316 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) [2022-03-20 12:47:00,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:47:00,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:00,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:47:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:00,542 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 [2022-03-20 12:47:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-20 12:47:00,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:00,693 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:00,694 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 [2022-03-20 12:47:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-20 12:47:00,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208666643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:00,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:00,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 23 [2022-03-20 12:47:00,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:00,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987946067] [2022-03-20 12:47:00,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987946067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:00,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:00,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:47:00,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647271166] [2022-03-20 12:47:00,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:00,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:47:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:00,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:47:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-20 12:47:00,748 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) [2022-03-20 12:47:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:01,403 INFO L93 Difference]: Finished difference Result 292 states and 403 transitions. [2022-03-20 12:47:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:47:01,404 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 [2022-03-20 12:47:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:01,405 INFO L225 Difference]: With dead ends: 292 [2022-03-20 12:47:01,405 INFO L226 Difference]: Without dead ends: 257 [2022-03-20 12:47:01,406 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 [2022-03-20 12:47:01,406 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:01,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 12:47:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-20 12:47:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 58. [2022-03-20 12:47:01,425 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) [2022-03-20 12:47:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-03-20 12:47:01,426 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 41 [2022-03-20 12:47:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:01,426 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-03-20 12:47:01,426 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) [2022-03-20 12:47:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-03-20 12:47:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 12:47:01,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:01,428 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] [2022-03-20 12:47:01,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:01,631 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 [2022-03-20 12:47:01,631 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 15 times [2022-03-20 12:47:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:01,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705878175] [2022-03-20 12:47:01,633 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:01,633 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:01,633 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 16 times [2022-03-20 12:47:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:01,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151035888] [2022-03-20 12:47:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:01,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:01,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:47:01,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151035888] [2022-03-20 12:47:01,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151035888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607781182] [2022-03-20 12:47:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:01,745 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) [2022-03-20 12:47:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:47:01,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:01,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:47:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:01,965 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 [2022-03-20 12:47:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-03-20 12:47:01,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:02,125 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:02,125 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 [2022-03-20 12:47:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-03-20 12:47:02,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607781182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:02,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:02,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2022-03-20 12:47:02,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705878175] [2022-03-20 12:47:02,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705878175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:02,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:02,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:47:02,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594661615] [2022-03-20 12:47:02,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:02,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:47:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:47:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:47:02,169 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) [2022-03-20 12:47:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:02,904 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2022-03-20 12:47:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:47:02,904 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 [2022-03-20 12:47:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:02,905 INFO L225 Difference]: With dead ends: 319 [2022-03-20 12:47:02,905 INFO L226 Difference]: Without dead ends: 284 [2022-03-20 12:47:02,906 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 [2022-03-20 12:47:02,906 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 [2022-03-20 12:47:02,906 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] [2022-03-20 12:47:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-20 12:47:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 60. [2022-03-20 12:47:02,919 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) [2022-03-20 12:47:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-20 12:47:02,920 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 43 [2022-03-20 12:47:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:02,920 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-20 12:47:02,920 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) [2022-03-20 12:47:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-20 12:47:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 12:47:02,920 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:02,921 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] [2022-03-20 12:47:02,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:03,131 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 [2022-03-20 12:47:03,131 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 17 times [2022-03-20 12:47:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:03,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475442660] [2022-03-20 12:47:03,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:03,133 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:03,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 18 times [2022-03-20 12:47:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:03,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900293184] [2022-03-20 12:47:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:47:03,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900293184] [2022-03-20 12:47:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900293184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520431261] [2022-03-20 12:47:03,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:03,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:03,300 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) [2022-03-20 12:47:03,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:47:03,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:47:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:47:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:03,517 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 [2022-03-20 12:47:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 12:47:03,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:03,650 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:03,650 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 [2022-03-20 12:47:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-20 12:47:03,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520431261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:03,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:03,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 24 [2022-03-20 12:47:03,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475442660] [2022-03-20 12:47:03,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475442660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:03,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:03,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:47:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681629032] [2022-03-20 12:47:03,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:03,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:47:03,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:03,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:47:03,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:47:03,712 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) [2022-03-20 12:47:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:04,645 INFO L93 Difference]: Finished difference Result 346 states and 479 transitions. [2022-03-20 12:47:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:47:04,645 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 [2022-03-20 12:47:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:04,648 INFO L225 Difference]: With dead ends: 346 [2022-03-20 12:47:04,648 INFO L226 Difference]: Without dead ends: 311 [2022-03-20 12:47:04,649 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 [2022-03-20 12:47:04,650 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:04,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 130 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 12:47:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-20 12:47:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 62. [2022-03-20 12:47:04,666 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) [2022-03-20 12:47:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-03-20 12:47:04,666 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 45 [2022-03-20 12:47:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:04,666 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-03-20 12:47:04,667 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) [2022-03-20 12:47:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-03-20 12:47:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 12:47:04,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:04,667 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] [2022-03-20 12:47:04,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:04,889 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 [2022-03-20 12:47:04,890 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 19 times [2022-03-20 12:47:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:04,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [958987509] [2022-03-20 12:47:04,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:04,891 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:04,891 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 20 times [2022-03-20 12:47:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534485591] [2022-03-20 12:47:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:04,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534485591] [2022-03-20 12:47:04,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534485591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:04,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120719211] [2022-03-20 12:47:04,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:04,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:04,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:04,940 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) [2022-03-20 12:47:04,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:47:05,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:05,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:47:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:05,182 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 [2022-03-20 12:47:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 12:47:05,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:05,293 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:05,294 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 [2022-03-20 12:47:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-03-20 12:47:05,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120719211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:05,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:05,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 8] total 18 [2022-03-20 12:47:05,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:05,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [958987509] [2022-03-20 12:47:05,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [958987509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:05,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:05,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:47:05,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045701794] [2022-03-20 12:47:05,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:05,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:47:05,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:47:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:47:05,335 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) [2022-03-20 12:47:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:05,439 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-20 12:47:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:47:05,439 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 [2022-03-20 12:47:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:05,440 INFO L225 Difference]: With dead ends: 115 [2022-03-20 12:47:05,440 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 12:47:05,440 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 [2022-03-20 12:47:05,441 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 [2022-03-20 12:47:05,441 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] [2022-03-20 12:47:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 12:47:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-03-20 12:47:05,464 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) [2022-03-20 12:47:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-03-20 12:47:05,465 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2022-03-20 12:47:05,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:05,465 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-03-20 12:47:05,465 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) [2022-03-20 12:47:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-03-20 12:47:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 12:47:05,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:05,466 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] [2022-03-20 12:47:05,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:05,666 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 [2022-03-20 12:47:05,666 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 21 times [2022-03-20 12:47:05,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:05,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [116567007] [2022-03-20 12:47:05,668 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:05,668 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:05,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 22 times [2022-03-20 12:47:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039041376] [2022-03-20 12:47:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:05,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039041376] [2022-03-20 12:47:05,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039041376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876210129] [2022-03-20 12:47:05,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:05,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:05,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:05,738 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) [2022-03-20 12:47:05,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 12:47:05,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:05,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 12:47:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:06,035 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 [2022-03-20 12:47:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-20 12:47:06,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:06,260 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:06,261 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 [2022-03-20 12:47:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 12:47:06,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876210129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:06,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 12] total 26 [2022-03-20 12:47:06,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:06,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [116567007] [2022-03-20 12:47:06,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [116567007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:06,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:47:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602146840] [2022-03-20 12:47:06,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:06,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:47:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:47:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:47:06,317 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) [2022-03-20 12:47:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:06,463 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-03-20 12:47:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:47:06,464 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 [2022-03-20 12:47:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:06,464 INFO L225 Difference]: With dead ends: 143 [2022-03-20 12:47:06,464 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 12:47:06,465 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 [2022-03-20 12:47:06,465 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 [2022-03-20 12:47:06,465 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] [2022-03-20 12:47:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 12:47:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-20 12:47:06,511 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) [2022-03-20 12:47:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-03-20 12:47:06,511 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-03-20 12:47:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:06,512 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-03-20 12:47:06,512 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) [2022-03-20 12:47:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-03-20 12:47:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 12:47:06,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:06,512 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] [2022-03-20 12:47:06,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 12:47:06,713 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 [2022-03-20 12:47:06,714 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 23 times [2022-03-20 12:47:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:06,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1086212463] [2022-03-20 12:47:06,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:06,716 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:06,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 24 times [2022-03-20 12:47:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:06,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290390478] [2022-03-20 12:47:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:06,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290390478] [2022-03-20 12:47:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290390478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653994813] [2022-03-20 12:47:06,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:06,788 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) [2022-03-20 12:47:06,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 12:47:06,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:47:06,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:47:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:07,027 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 [2022-03-20 12:47:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 12:47:07,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:07,147 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:07,148 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 [2022-03-20 12:47:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-20 12:47:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653994813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:07,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-03-20 12:47:07,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1086212463] [2022-03-20 12:47:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1086212463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:07,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:47:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912371746] [2022-03-20 12:47:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:07,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:47:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:47:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:47:07,192 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) [2022-03-20 12:47:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:07,363 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2022-03-20 12:47:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:47:07,363 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 [2022-03-20 12:47:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:07,364 INFO L225 Difference]: With dead ends: 167 [2022-03-20 12:47:07,364 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 12:47:07,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:47:07,365 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 [2022-03-20 12:47:07,365 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] [2022-03-20 12:47:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 12:47:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-03-20 12:47:07,400 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) [2022-03-20 12:47:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-20 12:47:07,400 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 53 [2022-03-20 12:47:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:07,401 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-20 12:47:07,401 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) [2022-03-20 12:47:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-20 12:47:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 12:47:07,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:07,401 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] [2022-03-20 12:47:07,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:07,603 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 [2022-03-20 12:47:07,603 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 25 times [2022-03-20 12:47:07,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:07,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350453994] [2022-03-20 12:47:07,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:07,605 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:07,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:07,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 26 times [2022-03-20 12:47:07,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:07,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750768668] [2022-03-20 12:47:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:07,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:07,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:07,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:07,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750768668] [2022-03-20 12:47:07,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750768668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:07,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5789954] [2022-03-20 12:47:07,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:07,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:07,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:07,672 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) [2022-03-20 12:47:07,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 12:47:07,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:07,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 12:47:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:08,080 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 [2022-03-20 12:47:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 12:47:08,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:08,360 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:08,360 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 [2022-03-20 12:47:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 12:47:08,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5789954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:08,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:08,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 28 [2022-03-20 12:47:08,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350453994] [2022-03-20 12:47:08,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350453994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:08,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:08,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:47:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367184213] [2022-03-20 12:47:08,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:08,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:47:08,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:47:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:47:08,410 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) [2022-03-20 12:47:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:08,640 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-03-20 12:47:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:47:08,641 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 [2022-03-20 12:47:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:08,642 INFO L225 Difference]: With dead ends: 191 [2022-03-20 12:47:08,642 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 12:47:08,643 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 [2022-03-20 12:47:08,643 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 [2022-03-20 12:47:08,643 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] [2022-03-20 12:47:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 12:47:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-03-20 12:47:08,691 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) [2022-03-20 12:47:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-03-20 12:47:08,692 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 56 [2022-03-20 12:47:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:08,692 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-03-20 12:47:08,692 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) [2022-03-20 12:47:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-03-20 12:47:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 12:47:08,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:08,693 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] [2022-03-20 12:47:08,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:08,903 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 [2022-03-20 12:47:08,903 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 27 times [2022-03-20 12:47:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:08,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013493798] [2022-03-20 12:47:08,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:08,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:08,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 28 times [2022-03-20 12:47:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:08,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710630258] [2022-03-20 12:47:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:08,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:08,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710630258] [2022-03-20 12:47:08,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710630258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909977461] [2022-03-20 12:47:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:08,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:09,000 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) [2022-03-20 12:47:09,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 12:47:09,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:09,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:09,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:47:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:09,286 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 [2022-03-20 12:47:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 12:47:09,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:09,440 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:09,440 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 [2022-03-20 12:47:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 12:47:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909977461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:09,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:09,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-03-20 12:47:09,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:09,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013493798] [2022-03-20 12:47:09,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013493798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:09,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:09,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:47:09,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844628785] [2022-03-20 12:47:09,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:09,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:47:09,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:47:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:47:09,485 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) [2022-03-20 12:47:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:09,746 INFO L93 Difference]: Finished difference Result 215 states and 281 transitions. [2022-03-20 12:47:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:47:09,746 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 [2022-03-20 12:47:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:09,747 INFO L225 Difference]: With dead ends: 215 [2022-03-20 12:47:09,747 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 12:47:09,747 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 [2022-03-20 12:47:09,748 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:09,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 75 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:47:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 12:47:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-03-20 12:47:09,797 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) [2022-03-20 12:47:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-03-20 12:47:09,798 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 59 [2022-03-20 12:47:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:09,798 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-03-20 12:47:09,798 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) [2022-03-20 12:47:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-03-20 12:47:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 12:47:09,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:09,798 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] [2022-03-20 12:47:09,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 12:47:10,030 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 [2022-03-20 12:47:10,030 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 29 times [2022-03-20 12:47:10,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:10,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185243599] [2022-03-20 12:47:10,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:10,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:10,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 30 times [2022-03-20 12:47:10,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:10,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196723889] [2022-03-20 12:47:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:10,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:10,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:10,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196723889] [2022-03-20 12:47:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196723889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185661150] [2022-03-20 12:47:10,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:10,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:10,136 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) [2022-03-20 12:47:10,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 12:47:10,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:47:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:47:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:10,457 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 [2022-03-20 12:47:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-20 12:47:10,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:10,591 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:10,591 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 [2022-03-20 12:47:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 12:47:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185661150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:10,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:10,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-03-20 12:47:10,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185243599] [2022-03-20 12:47:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185243599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:10,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:10,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:47:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542679910] [2022-03-20 12:47:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:10,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:47:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:47:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:47:10,638 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) [2022-03-20 12:47:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:10,961 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2022-03-20 12:47:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:47:10,962 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 [2022-03-20 12:47:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:10,962 INFO L225 Difference]: With dead ends: 239 [2022-03-20 12:47:10,962 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 12:47:10,963 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 [2022-03-20 12:47:10,963 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:10,964 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 64 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:47:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 12:47:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-20 12:47:11,014 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) [2022-03-20 12:47:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-03-20 12:47:11,015 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 62 [2022-03-20 12:47:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:11,015 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-03-20 12:47:11,015 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) [2022-03-20 12:47:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-03-20 12:47:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 12:47:11,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:11,015 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] [2022-03-20 12:47:11,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 12:47:11,231 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 [2022-03-20 12:47:11,231 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 31 times [2022-03-20 12:47:11,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:11,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1467373191] [2022-03-20 12:47:11,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:11,232 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:11,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 32 times [2022-03-20 12:47:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744471628] [2022-03-20 12:47:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:11,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:11,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744471628] [2022-03-20 12:47:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744471628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895917582] [2022-03-20 12:47:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:11,330 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) [2022-03-20 12:47:11,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 12:47:11,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:11,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 12:47:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:11,818 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 [2022-03-20 12:47:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-20 12:47:11,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:12,191 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:12,191 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 [2022-03-20 12:47:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-20 12:47:12,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895917582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:12,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:12,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2022-03-20 12:47:12,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1467373191] [2022-03-20 12:47:12,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1467373191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:12,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:12,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:47:12,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288595198] [2022-03-20 12:47:12,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:12,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:47:12,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:47:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:47:12,246 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) [2022-03-20 12:47:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:12,659 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2022-03-20 12:47:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:47:12,668 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 [2022-03-20 12:47:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:12,668 INFO L225 Difference]: With dead ends: 263 [2022-03-20 12:47:12,668 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 12:47:12,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 12:47:12,670 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 [2022-03-20 12:47:12,670 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] [2022-03-20 12:47:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 12:47:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-03-20 12:47:12,727 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) [2022-03-20 12:47:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-03-20 12:47:12,727 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 65 [2022-03-20 12:47:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:12,728 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-03-20 12:47:12,728 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) [2022-03-20 12:47:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-03-20 12:47:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 12:47:12,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:12,728 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] [2022-03-20 12:47:12,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:12,945 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 [2022-03-20 12:47:12,945 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 33 times [2022-03-20 12:47:12,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675399296] [2022-03-20 12:47:12,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:12,947 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:12,947 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 34 times [2022-03-20 12:47:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626727780] [2022-03-20 12:47:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:12,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 12:47:13,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:13,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626727780] [2022-03-20 12:47:13,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626727780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:13,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705893598] [2022-03-20 12:47:13,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:13,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:13,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:13,127 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) [2022-03-20 12:47:13,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 12:47:13,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 12:47:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:13,502 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 [2022-03-20 12:47:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 12:47:13,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:13,712 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-20 12:47:13,713 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 [2022-03-20 12:47:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 12:47:13,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705893598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:13,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:13,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 22 [2022-03-20 12:47:13,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:13,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675399296] [2022-03-20 12:47:13,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675399296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:13,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:13,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:47:13,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010085425] [2022-03-20 12:47:13,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:13,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:47:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:47:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:47:13,763 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) [2022-03-20 12:47:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:14,017 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2022-03-20 12:47:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:47:14,022 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 [2022-03-20 12:47:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:14,023 INFO L225 Difference]: With dead ends: 263 [2022-03-20 12:47:14,023 INFO L226 Difference]: Without dead ends: 258 [2022-03-20 12:47:14,023 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 [2022-03-20 12:47:14,024 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 12:47:14,024 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] [2022-03-20 12:47:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-20 12:47:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 152. [2022-03-20 12:47:14,107 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) [2022-03-20 12:47:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 192 transitions. [2022-03-20 12:47:14,108 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 192 transitions. Word has length 68 [2022-03-20 12:47:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:14,108 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 192 transitions. [2022-03-20 12:47:14,108 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) [2022-03-20 12:47:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 192 transitions. [2022-03-20 12:47:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 12:47:14,108 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:14,108 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] [2022-03-20 12:47:14,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:14,312 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 [2022-03-20 12:47:14,312 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 1 times [2022-03-20 12:47:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637806245] [2022-03-20 12:47:14,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:14,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:14,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 2 times [2022-03-20 12:47:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:14,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047178791] [2022-03-20 12:47:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:14,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:14,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:14,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047178791] [2022-03-20 12:47:14,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047178791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541391017] [2022-03-20 12:47:14,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:14,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:14,456 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) [2022-03-20 12:47:14,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 12:47:14,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:14,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:14,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 12:47:14,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-03-20 12:47:14,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:15,320 INFO L356 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2022-03-20 12:47:15,320 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 [2022-03-20 12:47:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 12:47:15,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541391017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:15,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:15,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 25 [2022-03-20 12:47:15,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637806245] [2022-03-20 12:47:15,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637806245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:15,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:15,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:47:15,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730126770] [2022-03-20 12:47:15,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:15,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:47:15,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:47:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:47:15,411 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) [2022-03-20 12:47:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:15,888 INFO L93 Difference]: Finished difference Result 243 states and 315 transitions. [2022-03-20 12:47:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:47:15,889 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 [2022-03-20 12:47:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:15,890 INFO L225 Difference]: With dead ends: 243 [2022-03-20 12:47:15,890 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 12:47:15,890 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 [2022-03-20 12:47:15,890 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:15,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 101 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:47:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 12:47:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2022-03-20 12:47:15,974 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) [2022-03-20 12:47:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2022-03-20 12:47:15,975 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 69 [2022-03-20 12:47:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:15,975 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2022-03-20 12:47:15,975 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) [2022-03-20 12:47:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2022-03-20 12:47:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 12:47:15,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:15,976 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] [2022-03-20 12:47:15,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 12:47:16,176 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 [2022-03-20 12:47:16,176 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 3 times [2022-03-20 12:47:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:16,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414943674] [2022-03-20 12:47:16,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:16,178 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:16,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 4 times [2022-03-20 12:47:16,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:16,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143182663] [2022-03-20 12:47:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:16,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:16,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143182663] [2022-03-20 12:47:16,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143182663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878732558] [2022-03-20 12:47:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:16,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:16,313 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) [2022-03-20 12:47:16,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 12:47:16,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:16,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:47:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:16,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-20 12:47:16,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878732558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:16,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:16,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 12:47:16,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:16,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414943674] [2022-03-20 12:47:16,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414943674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:16,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:16,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:47:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553389171] [2022-03-20 12:47:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:16,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:47:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:47:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:47:16,821 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) [2022-03-20 12:47:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:17,303 INFO L93 Difference]: Finished difference Result 297 states and 386 transitions. [2022-03-20 12:47:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:47:17,304 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 [2022-03-20 12:47:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:17,304 INFO L225 Difference]: With dead ends: 297 [2022-03-20 12:47:17,304 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 12:47:17,305 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 [2022-03-20 12:47:17,305 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 [2022-03-20 12:47:17,305 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] [2022-03-20 12:47:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 12:47:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2022-03-20 12:47:17,382 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) [2022-03-20 12:47:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2022-03-20 12:47:17,382 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 72 [2022-03-20 12:47:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:17,382 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2022-03-20 12:47:17,382 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) [2022-03-20 12:47:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2022-03-20 12:47:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 12:47:17,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:17,383 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] [2022-03-20 12:47:17,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 12:47:17,583 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 [2022-03-20 12:47:17,584 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 5 times [2022-03-20 12:47:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181405847] [2022-03-20 12:47:17,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:17,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:17,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 6 times [2022-03-20 12:47:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586068333] [2022-03-20 12:47:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:17,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 12:47:17,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:17,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586068333] [2022-03-20 12:47:17,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586068333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:17,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694475846] [2022-03-20 12:47:17,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:17,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:17,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:17,665 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) [2022-03-20 12:47:17,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 12:47:17,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:47:17,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:17,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 12:47:17,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-20 12:47:17,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 12:47:17,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694475846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:17,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:17,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-03-20 12:47:17,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:17,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181405847] [2022-03-20 12:47:17,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181405847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:17,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:17,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:47:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748945767] [2022-03-20 12:47:17,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:17,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:47:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:47:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:47:17,936 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) [2022-03-20 12:47:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:18,479 INFO L93 Difference]: Finished difference Result 732 states and 956 transitions. [2022-03-20 12:47:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:47:18,479 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 [2022-03-20 12:47:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:18,481 INFO L225 Difference]: With dead ends: 732 [2022-03-20 12:47:18,481 INFO L226 Difference]: Without dead ends: 658 [2022-03-20 12:47:18,482 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 [2022-03-20 12:47:18,482 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 [2022-03-20 12:47:18,482 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] [2022-03-20 12:47:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-20 12:47:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 170. [2022-03-20 12:47:18,594 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) [2022-03-20 12:47:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-03-20 12:47:18,595 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 75 [2022-03-20 12:47:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:18,595 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-03-20 12:47:18,595 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) [2022-03-20 12:47:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-03-20 12:47:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 12:47:18,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:18,595 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] [2022-03-20 12:47:18,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:18,800 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 [2022-03-20 12:47:18,801 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 7 times [2022-03-20 12:47:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:18,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60450249] [2022-03-20 12:47:18,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:18,802 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:18,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 8 times [2022-03-20 12:47:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:18,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387815273] [2022-03-20 12:47:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 12:47:18,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:18,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387815273] [2022-03-20 12:47:18,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387815273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:18,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989433119] [2022-03-20 12:47:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:18,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:18,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:18,898 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) [2022-03-20 12:47:18,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 12:47:19,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:19,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:19,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 12:47:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:19,358 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 [2022-03-20 12:47:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 12:47:19,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:19,777 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-03-20 12:47:19,777 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 [2022-03-20 12:47:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 12:47:19,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989433119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:19,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:19,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 24 [2022-03-20 12:47:19,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:19,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60450249] [2022-03-20 12:47:19,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60450249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:19,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:19,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:47:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056792058] [2022-03-20 12:47:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:19,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:47:19,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:47:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:47:19,846 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) [2022-03-20 12:47:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:20,470 INFO L93 Difference]: Finished difference Result 747 states and 975 transitions. [2022-03-20 12:47:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:47:20,470 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 [2022-03-20 12:47:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:20,472 INFO L225 Difference]: With dead ends: 747 [2022-03-20 12:47:20,472 INFO L226 Difference]: Without dead ends: 673 [2022-03-20 12:47:20,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-20 12:47:20,473 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 [2022-03-20 12:47:20,473 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] [2022-03-20 12:47:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-20 12:47:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 172. [2022-03-20 12:47:20,561 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) [2022-03-20 12:47:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 217 transitions. [2022-03-20 12:47:20,561 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 217 transitions. Word has length 79 [2022-03-20 12:47:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:20,562 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 217 transitions. [2022-03-20 12:47:20,562 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) [2022-03-20 12:47:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 217 transitions. [2022-03-20 12:47:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 12:47:20,562 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:20,563 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] [2022-03-20 12:47:20,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:20,775 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 [2022-03-20 12:47:20,775 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 9 times [2022-03-20 12:47:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152793345] [2022-03-20 12:47:20,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:20,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:20,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 10 times [2022-03-20 12:47:20,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:20,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037655542] [2022-03-20 12:47:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:20,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 12:47:20,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:20,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037655542] [2022-03-20 12:47:20,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037655542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:20,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875667780] [2022-03-20 12:47:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:20,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:20,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:20,912 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) [2022-03-20 12:47:20,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 12:47:21,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:21,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:21,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 12:47:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:21,413 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 [2022-03-20 12:47:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-03-20 12:47:21,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:21,806 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-03-20 12:47:21,807 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 [2022-03-20 12:47:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:47:21,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875667780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:21,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:21,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 26 [2022-03-20 12:47:21,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:21,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152793345] [2022-03-20 12:47:21,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152793345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:21,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:21,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:47:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387673526] [2022-03-20 12:47:21,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:21,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:47:21,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:47:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:47:21,877 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) [2022-03-20 12:47:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:22,969 INFO L93 Difference]: Finished difference Result 1125 states and 1475 transitions. [2022-03-20 12:47:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:47:22,970 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 [2022-03-20 12:47:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:22,972 INFO L225 Difference]: With dead ends: 1125 [2022-03-20 12:47:22,972 INFO L226 Difference]: Without dead ends: 1051 [2022-03-20 12:47:22,973 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 [2022-03-20 12:47:22,973 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:22,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 128 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:47:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-03-20 12:47:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 176. [2022-03-20 12:47:23,066 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) [2022-03-20 12:47:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2022-03-20 12:47:23,067 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 81 [2022-03-20 12:47:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:23,067 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2022-03-20 12:47:23,067 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) [2022-03-20 12:47:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2022-03-20 12:47:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 12:47:23,068 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:23,068 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] [2022-03-20 12:47:23,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 12:47:23,268 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 [2022-03-20 12:47:23,268 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:23,269 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 11 times [2022-03-20 12:47:23,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:23,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119866849] [2022-03-20 12:47:23,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:23,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:23,270 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:23,270 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 12 times [2022-03-20 12:47:23,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:23,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751500970] [2022-03-20 12:47:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:23,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:23,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-20 12:47:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751500970] [2022-03-20 12:47:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751500970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748277892] [2022-03-20 12:47:23,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:23,407 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) [2022-03-20 12:47:23,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 12:47:23,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:47:23,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:47:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-03-20 12:47:23,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:24,086 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 12:47:24,086 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 [2022-03-20 12:47:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-20 12:47:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748277892] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:24,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 12:47:24,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 26 [2022-03-20 12:47:24,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:24,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119866849] [2022-03-20 12:47:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119866849] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:24,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:24,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:47:24,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960190757] [2022-03-20 12:47:24,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:24,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:47:24,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:47:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:47:24,122 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) [2022-03-20 12:47:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:24,360 INFO L93 Difference]: Finished difference Result 319 states and 411 transitions. [2022-03-20 12:47:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:47:24,361 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 [2022-03-20 12:47:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:24,362 INFO L225 Difference]: With dead ends: 319 [2022-03-20 12:47:24,362 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 12:47:24,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:47:24,362 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 [2022-03-20 12:47:24,363 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] [2022-03-20 12:47:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 12:47:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 165. [2022-03-20 12:47:24,465 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) [2022-03-20 12:47:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 207 transitions. [2022-03-20 12:47:24,466 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 207 transitions. Word has length 85 [2022-03-20 12:47:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:24,466 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 207 transitions. [2022-03-20 12:47:24,466 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) [2022-03-20 12:47:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 207 transitions. [2022-03-20 12:47:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:47:24,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:24,467 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] [2022-03-20 12:47:24,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 12:47:24,668 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 [2022-03-20 12:47:24,668 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 1 times [2022-03-20 12:47:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:24,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938822925] [2022-03-20 12:47:24,670 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:24,670 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:24,670 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 2 times [2022-03-20 12:47:24,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:24,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115871782] [2022-03-20 12:47:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:24,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:26,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 12:47:26,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115871782] [2022-03-20 12:47:26,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115871782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90003628] [2022-03-20 12:47:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:26,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:26,940 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) [2022-03-20 12:47:26,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 12:47:27,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 12:47:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:27,159 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 [2022-03-20 12:47:27,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,370 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 [2022-03-20 12:47:27,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,489 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 23 treesize of output 23 [2022-03-20 12:47:27,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:27,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:28,588 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 [2022-03-20 12:47:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 93 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-20 12:47:28,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:29,813 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 [2022-03-20 12:47:29,958 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 [2022-03-20 12:47:29,967 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 [2022-03-20 12:47:29,982 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 [2022-03-20 12:47:29,993 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)) (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 [2022-03-20 12:47:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-20 12:47:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90003628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:30,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:30,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 21] total 65 [2022-03-20 12:47:30,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938822925] [2022-03-20 12:47:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938822925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:30,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:30,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 12:47:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732448429] [2022-03-20 12:47:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:30,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 12:47:30,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 12:47:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3224, Unknown=5, NotChecked=600, Total=4160 [2022-03-20 12:47:30,009 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) [2022-03-20 12:47:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:33,713 INFO L93 Difference]: Finished difference Result 434 states and 562 transitions. [2022-03-20 12:47:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 12:47:33,713 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 [2022-03-20 12:47:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:33,714 INFO L225 Difference]: With dead ends: 434 [2022-03-20 12:47:33,715 INFO L226 Difference]: Without dead ends: 395 [2022-03-20 12:47:33,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=828, Invalid=8117, Unknown=5, NotChecked=950, Total=9900 [2022-03-20 12:47:33,719 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:33,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 119 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 12:47:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-20 12:47:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 282. [2022-03-20 12:47:33,920 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) [2022-03-20 12:47:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 361 transitions. [2022-03-20 12:47:33,921 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 361 transitions. Word has length 102 [2022-03-20 12:47:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:33,921 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 361 transitions. [2022-03-20 12:47:33,921 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) [2022-03-20 12:47:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 361 transitions. [2022-03-20 12:47:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:47:33,922 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:33,922 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] [2022-03-20 12:47:33,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 12:47:34,122 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 [2022-03-20 12:47:34,122 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 1 times [2022-03-20 12:47:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:34,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82448359] [2022-03-20 12:47:34,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:34,124 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:34,124 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 2 times [2022-03-20 12:47:34,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:34,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631486208] [2022-03-20 12:47:34,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:34,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 12:47:34,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:34,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631486208] [2022-03-20 12:47:34,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631486208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628647762] [2022-03-20 12:47:34,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:34,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:34,777 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) [2022-03-20 12:47:34,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 12:47:34,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:34,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 12:47:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:35,021 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 [2022-03-20 12:47:35,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,124 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 23 treesize of output 23 [2022-03-20 12:47:35,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,172 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 [2022-03-20 12:47:35,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-20 12:47:35,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:36,298 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 [2022-03-20 12:47:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-20 12:47:36,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628647762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:36,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:36,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 34 [2022-03-20 12:47:36,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82448359] [2022-03-20 12:47:36,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82448359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:36,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:36,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:47:36,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24741286] [2022-03-20 12:47:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:36,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:47:36,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:47:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=934, Unknown=1, NotChecked=62, Total=1122 [2022-03-20 12:47:36,448 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) [2022-03-20 12:47:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:37,567 INFO L93 Difference]: Finished difference Result 449 states and 578 transitions. [2022-03-20 12:47:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:47:37,567 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 [2022-03-20 12:47:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:37,568 INFO L225 Difference]: With dead ends: 449 [2022-03-20 12:47:37,568 INFO L226 Difference]: Without dead ends: 321 [2022-03-20 12:47:37,569 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 [2022-03-20 12:47:37,569 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 103 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-20 12:47:37,570 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] [2022-03-20 12:47:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-20 12:47:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2022-03-20 12:47:37,789 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) [2022-03-20 12:47:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 406 transitions. [2022-03-20 12:47:37,789 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 406 transitions. Word has length 102 [2022-03-20 12:47:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:37,790 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 406 transitions. [2022-03-20 12:47:37,790 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) [2022-03-20 12:47:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 406 transitions. [2022-03-20 12:47:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:47:37,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:37,790 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] [2022-03-20 12:47:37,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 12:47:37,994 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 [2022-03-20 12:47:37,994 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 1 times [2022-03-20 12:47:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521320748] [2022-03-20 12:47:37,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:37,995 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:37,995 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 2 times [2022-03-20 12:47:37,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:37,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24979661] [2022-03-20 12:47:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:38,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 12:47:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24979661] [2022-03-20 12:47:38,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24979661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24350832] [2022-03-20 12:47:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:38,559 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) [2022-03-20 12:47:38,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 12:47:38,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 12:47:38,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:38,881 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 [2022-03-20 12:47:38,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:38,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:38,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:39,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:39,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:39,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:39,085 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 25 treesize of output 25 [2022-03-20 12:47:39,105 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 25 treesize of output 25 [2022-03-20 12:47:39,124 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 [2022-03-20 12:47:39,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:39,169 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 25 treesize of output 25 [2022-03-20 12:47:39,771 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:47:39,772 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 [2022-03-20 12:47:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 83 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:47:39,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:53,017 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 [2022-03-20 12:47:53,104 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 4294967296) 10))) is different from false [2022-03-20 12:47:53,532 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 [2022-03-20 12:47:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-03-20 12:47:53,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24350832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:53,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:53,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 19] total 44 [2022-03-20 12:47:53,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:53,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521320748] [2022-03-20 12:47:53,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521320748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:53,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:53,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:47:53,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932260018] [2022-03-20 12:47:53,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:53,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:47:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:47:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1394, Unknown=13, NotChecked=240, Total=1892 [2022-03-20 12:47:53,556 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) [2022-03-20 12:47:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:54,464 INFO L93 Difference]: Finished difference Result 509 states and 653 transitions. [2022-03-20 12:47:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:47:54,465 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 [2022-03-20 12:47:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:54,466 INFO L225 Difference]: With dead ends: 509 [2022-03-20 12:47:54,466 INFO L226 Difference]: Without dead ends: 318 [2022-03-20 12:47:54,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=303, Invalid=2146, Unknown=13, NotChecked=294, Total=2756 [2022-03-20 12:47:54,467 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 [2022-03-20 12:47:54,467 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] [2022-03-20 12:47:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-20 12:47:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-03-20 12:47:54,696 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) [2022-03-20 12:47:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 403 transitions. [2022-03-20 12:47:54,697 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 403 transitions. Word has length 102 [2022-03-20 12:47:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:54,697 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 403 transitions. [2022-03-20 12:47:54,697 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) [2022-03-20 12:47:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 403 transitions. [2022-03-20 12:47:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:47:54,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:54,698 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] [2022-03-20 12:47:54,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:54,911 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 [2022-03-20 12:47:54,911 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1906970572, now seen corresponding path program 3 times [2022-03-20 12:47:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917095159] [2022-03-20 12:47:54,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:54,913 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:54,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1906970572, now seen corresponding path program 4 times [2022-03-20 12:47:54,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:54,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647622483] [2022-03-20 12:47:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 199 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-03-20 12:47:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647622483] [2022-03-20 12:47:56,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647622483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207457415] [2022-03-20 12:47:56,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:56,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:56,904 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) [2022-03-20 12:47:56,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 12:47:57,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:57,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 12:47:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:57,097 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 [2022-03-20 12:47:57,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:47:57,448 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 25 treesize of output 25 [2022-03-20 12:48:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:48:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:48:00,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:48:00,318 INFO L356 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2022-03-20 12:48:00,318 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 [2022-03-20 12:48:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 98 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 12:48:00,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:05,699 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 [2022-03-20 12:48:20,920 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 [2022-03-20 12:48:21,780 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 [2022-03-20 12:48:23,619 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 [2022-03-20 12:48:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-20 12:48:24,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207457415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:24,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:24,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 20] total 62 [2022-03-20 12:48:24,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917095159] [2022-03-20 12:48:24,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917095159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:24,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:24,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 12:48:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747841547] [2022-03-20 12:48:24,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:24,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 12:48:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 12:48:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3034, Unknown=4, NotChecked=460, Total=3782 [2022-03-20 12:48:24,592 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) [2022-03-20 12:48:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:27,550 INFO L93 Difference]: Finished difference Result 588 states and 758 transitions. [2022-03-20 12:48:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:48:27,551 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 [2022-03-20 12:48:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:27,552 INFO L225 Difference]: With dead ends: 588 [2022-03-20 12:48:27,552 INFO L226 Difference]: Without dead ends: 549 [2022-03-20 12:48:27,554 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 [2022-03-20 12:48:27,554 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 324 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:27,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 94 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:48:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-20 12:48:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 306. [2022-03-20 12:48:27,773 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) [2022-03-20 12:48:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 389 transitions. [2022-03-20 12:48:27,774 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 389 transitions. Word has length 102 [2022-03-20 12:48:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:27,774 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 389 transitions. [2022-03-20 12:48:27,774 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) [2022-03-20 12:48:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 389 transitions. [2022-03-20 12:48:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:48:27,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:27,775 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] [2022-03-20 12:48:27,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:27,975 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 [2022-03-20 12:48:27,975 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 1 times [2022-03-20 12:48:27,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:27,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1526993930] [2022-03-20 12:48:27,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:27,977 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:27,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2022-03-20 12:48:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:27,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115194950] [2022-03-20 12:48:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:28,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 12:48:28,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115194950] [2022-03-20 12:48:28,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115194950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526420925] [2022-03-20 12:48:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:28,602 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) [2022-03-20 12:48:28,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 12:48:28,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 12:48:28,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:28,930 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 [2022-03-20 12:48:28,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:28,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,030 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 [2022-03-20 12:48:29,047 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 [2022-03-20 12:48:29,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,080 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 [2022-03-20 12:48:29,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:29,740 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:48:29,740 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 [2022-03-20 12:48:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 12:48:29,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:44,939 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 [2022-03-20 12:48:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-20 12:48:45,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526420925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:45,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:45,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 41 [2022-03-20 12:48:45,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1526993930] [2022-03-20 12:48:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1526993930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:45,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:45,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:48:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700112828] [2022-03-20 12:48:45,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:45,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:48:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:48:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1343, Unknown=8, NotChecked=76, Total=1640 [2022-03-20 12:48:45,070 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) [2022-03-20 12:48:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:46,085 INFO L93 Difference]: Finished difference Result 458 states and 583 transitions. [2022-03-20 12:48:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:48:46,085 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 [2022-03-20 12:48:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:46,086 INFO L225 Difference]: With dead ends: 458 [2022-03-20 12:48:46,086 INFO L226 Difference]: Without dead ends: 306 [2022-03-20 12:48:46,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=287, Invalid=2159, Unknown=8, NotChecked=96, Total=2550 [2022-03-20 12:48:46,087 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 [2022-03-20 12:48:46,088 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] [2022-03-20 12:48:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-20 12:48:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-20 12:48:46,313 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) [2022-03-20 12:48:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 387 transitions. [2022-03-20 12:48:46,314 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 387 transitions. Word has length 102 [2022-03-20 12:48:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:46,314 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 387 transitions. [2022-03-20 12:48:46,314 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) [2022-03-20 12:48:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 387 transitions. [2022-03-20 12:48:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:48:46,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:46,315 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] [2022-03-20 12:48:46,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:46,524 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 [2022-03-20 12:48:46,525 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2022-03-20 12:48:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948748790] [2022-03-20 12:48:46,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:46,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:46,526 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:46,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 4 times [2022-03-20 12:48:46,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:46,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418354190] [2022-03-20 12:48:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:46,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:47,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:48:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418354190] [2022-03-20 12:48:47,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418354190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254873393] [2022-03-20 12:48:47,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:47,093 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) [2022-03-20 12:48:47,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 12:48:47,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:47,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:47,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 12:48:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:47,355 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 [2022-03-20 12:48:47,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,538 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 25 treesize of output 25 [2022-03-20 12:48:47,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:48:47,631 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 25 treesize of output 25 [2022-03-20 12:48:47,663 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 25 treesize of output 25 [2022-03-20 12:48:48,412 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 12:48:48,413 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 [2022-03-20 12:48:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 12:48:48,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:51,165 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 [2022-03-20 12:48:52,137 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 [2022-03-20 12:48:52,213 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 [2022-03-20 12:48:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 241 trivial. 28 not checked. [2022-03-20 12:48:52,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254873393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:52,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:52,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 40 [2022-03-20 12:48:52,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:52,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948748790] [2022-03-20 12:48:52,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948748790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:52,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:52,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:48:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554100244] [2022-03-20 12:48:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:52,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:48:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:48:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1188, Unknown=3, NotChecked=216, Total=1560 [2022-03-20 12:48:52,296 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) [2022-03-20 12:48:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:53,407 INFO L93 Difference]: Finished difference Result 458 states and 579 transitions. [2022-03-20 12:48:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:48:53,407 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 [2022-03-20 12:48:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:53,408 INFO L225 Difference]: With dead ends: 458 [2022-03-20 12:48:53,408 INFO L226 Difference]: Without dead ends: 306 [2022-03-20 12:48:53,409 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 [2022-03-20 12:48:53,409 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 [2022-03-20 12:48:53,409 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] [2022-03-20 12:48:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-20 12:48:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-20 12:48:53,639 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) [2022-03-20 12:48:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 385 transitions. [2022-03-20 12:48:53,639 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 385 transitions. Word has length 102 [2022-03-20 12:48:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:53,639 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 385 transitions. [2022-03-20 12:48:53,640 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) [2022-03-20 12:48:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 385 transitions. [2022-03-20 12:48:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:48:53,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:53,640 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] [2022-03-20 12:48:53,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:53,841 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 [2022-03-20 12:48:53,841 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 5 times [2022-03-20 12:48:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:53,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299815649] [2022-03-20 12:48:53,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:53,843 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:53,843 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 6 times [2022-03-20 12:48:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:53,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660578639] [2022-03-20 12:48:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:55,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 12:48:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660578639] [2022-03-20 12:48:55,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660578639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097451655] [2022-03-20 12:48:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:55,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:55,095 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) [2022-03-20 12:48:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 12:48:55,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:48:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 12:48:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:49:17,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:49:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:49:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:49:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:49:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:49:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:49:17,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:49:17,553 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 12:49:17,553 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 [2022-03-20 12:49:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 114 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 12:49:17,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 87 proven. 123 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 12:49:30,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097451655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:30,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:30,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 27] total 71 [2022-03-20 12:49:30,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299815649] [2022-03-20 12:49:30,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299815649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:30,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:30,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:49:30,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458784584] [2022-03-20 12:49:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:30,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:49:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:49:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=4142, Unknown=13, NotChecked=0, Total=4970 [2022-03-20 12:49:30,105 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) [2022-03-20 12:49:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:31,355 INFO L93 Difference]: Finished difference Result 787 states and 998 transitions. [2022-03-20 12:49:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:49:31,356 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 [2022-03-20 12:49:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:31,358 INFO L225 Difference]: With dead ends: 787 [2022-03-20 12:49:31,358 INFO L226 Difference]: Without dead ends: 733 [2022-03-20 12:49:31,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1139, Invalid=6330, Unknown=13, NotChecked=0, Total=7482 [2022-03-20 12:49:31,359 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 [2022-03-20 12:49:31,359 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] [2022-03-20 12:49:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-20 12:49:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 513. [2022-03-20 12:49:31,761 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) [2022-03-20 12:49:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 649 transitions. [2022-03-20 12:49:31,767 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 649 transitions. Word has length 102 [2022-03-20 12:49:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:31,768 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 649 transitions. [2022-03-20 12:49:31,768 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) [2022-03-20 12:49:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 649 transitions. [2022-03-20 12:49:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:49:31,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:31,769 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] [2022-03-20 12:49:31,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:31,974 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 [2022-03-20 12:49:31,974 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 7 times [2022-03-20 12:49:31,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:31,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1553968935] [2022-03-20 12:49:31,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:31,976 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:31,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 8 times [2022-03-20 12:49:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053719448] [2022-03-20 12:49:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:31,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:33,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 12:49:33,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053719448] [2022-03-20 12:49:33,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053719448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330714700] [2022-03-20 12:49:33,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:49:33,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:33,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:33,517 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) [2022-03-20 12:49:33,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 12:49:33,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:49:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:33,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 12:49:33,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:33,717 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 [2022-03-20 12:49:33,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:33,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:33,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:33,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:33,923 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 [2022-03-20 12:49:33,942 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 [2022-03-20 12:49:33,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:33,986 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 [2022-03-20 12:49:34,008 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 [2022-03-20 12:49:34,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:34,057 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 23 treesize of output 23 [2022-03-20 12:49:35,080 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 12:49:35,081 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 [2022-03-20 12:49:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 12:49:35,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:38,048 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 [2022-03-20 12:49:38,897 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 [2022-03-20 12:49:38,952 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 [2022-03-20 12:49:39,058 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 [2022-03-20 12:49:39,122 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 [2022-03-20 12:49:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-20 12:49:39,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330714700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:39,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:39,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 20] total 58 [2022-03-20 12:49:39,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:39,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1553968935] [2022-03-20 12:49:39,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1553968935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:39,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:39,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:49:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487427915] [2022-03-20 12:49:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:39,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:49:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:49:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2458, Unknown=5, NotChecked=530, Total=3306 [2022-03-20 12:49:39,151 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) [2022-03-20 12:49:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:42,158 INFO L93 Difference]: Finished difference Result 1136 states and 1450 transitions. [2022-03-20 12:49:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:49:42,159 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 [2022-03-20 12:49:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:42,161 INFO L225 Difference]: With dead ends: 1136 [2022-03-20 12:49:42,161 INFO L226 Difference]: Without dead ends: 896 [2022-03-20 12:49:42,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=681, Invalid=5654, Unknown=5, NotChecked=800, Total=7140 [2022-03-20 12:49:42,162 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 [2022-03-20 12:49:42,162 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] [2022-03-20 12:49:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-03-20 12:49:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 718. [2022-03-20 12:49:42,748 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) [2022-03-20 12:49:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 908 transitions. [2022-03-20 12:49:42,750 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 908 transitions. Word has length 102 [2022-03-20 12:49:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:42,750 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 908 transitions. [2022-03-20 12:49:42,750 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) [2022-03-20 12:49:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 908 transitions. [2022-03-20 12:49:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:49:42,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:42,751 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] [2022-03-20 12:49:42,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:42,963 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 [2022-03-20 12:49:42,963 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 9 times [2022-03-20 12:49:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061967759] [2022-03-20 12:49:42,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:42,965 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:42,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 10 times [2022-03-20 12:49:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:42,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782241850] [2022-03-20 12:49:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:44,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 149 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 12:49:44,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:44,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782241850] [2022-03-20 12:49:44,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782241850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:44,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869169337] [2022-03-20 12:49:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:44,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:44,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:44,441 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) [2022-03-20 12:49:44,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 12:49:44,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:44,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:44,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 12:49:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:44,712 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 [2022-03-20 12:49:44,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:44,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:45,364 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 [2022-03-20 12:49:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:49:45,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:46,302 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 [2022-03-20 12:49:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 12:49:46,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869169337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:46,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:46,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 17] total 51 [2022-03-20 12:49:46,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061967759] [2022-03-20 12:49:46,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061967759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:46,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:46,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 12:49:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803375092] [2022-03-20 12:49:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:46,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 12:49:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 12:49:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2193, Unknown=1, NotChecked=96, Total=2550 [2022-03-20 12:49:46,421 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) [2022-03-20 12:49:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:48,571 INFO L93 Difference]: Finished difference Result 1515 states and 1906 transitions. [2022-03-20 12:49:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 12:49:48,572 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 [2022-03-20 12:49:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:48,575 INFO L225 Difference]: With dead ends: 1515 [2022-03-20 12:49:48,575 INFO L226 Difference]: Without dead ends: 1467 [2022-03-20 12:49:48,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=478, Invalid=4355, Unknown=1, NotChecked=136, Total=4970 [2022-03-20 12:49:48,576 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 372 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-20 12:49:48,576 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] [2022-03-20 12:49:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-20 12:49:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1235. [2022-03-20 12:49:49,629 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) [2022-03-20 12:49:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1563 transitions. [2022-03-20 12:49:49,631 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1563 transitions. Word has length 102 [2022-03-20 12:49:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:49,631 INFO L478 AbstractCegarLoop]: Abstraction has 1235 states and 1563 transitions. [2022-03-20 12:49:49,631 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) [2022-03-20 12:49:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1563 transitions. [2022-03-20 12:49:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:49:49,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:49,633 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] [2022-03-20 12:49:49,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:49,850 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 [2022-03-20 12:49:49,850 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 11 times [2022-03-20 12:49:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:49,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [314105247] [2022-03-20 12:49:49,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:49,851 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:49,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 12 times [2022-03-20 12:49:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:49,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610141981] [2022-03-20 12:49:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:51,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 172 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-20 12:49:51,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610141981] [2022-03-20 12:49:51,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610141981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964627778] [2022-03-20 12:49:51,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:49:51,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:51,735 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) [2022-03-20 12:49:51,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 12:49:52,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 12:49:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 12:49:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:52,533 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 [2022-03-20 12:49:52,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:52,594 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 [2022-03-20 12:49:52,610 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 [2022-03-20 12:49:52,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:52,644 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 [2022-03-20 12:49:52,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:52,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:52,692 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 [2022-03-20 12:49:52,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:49:52,724 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 [2022-03-20 12:49:52,750 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 23 treesize of output 23 [2022-03-20 12:49:53,448 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:49:53,448 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 [2022-03-20 12:49:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-20 12:49:53,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:05,149 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 [2022-03-20 12:50:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-20 12:50:05,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964627778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:05,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:05,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13, 15] total 54 [2022-03-20 12:50:05,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [314105247] [2022-03-20 12:50:05,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [314105247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:05,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:05,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 12:50:05,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69082920] [2022-03-20 12:50:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:05,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 12:50:05,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 12:50:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2477, Unknown=7, NotChecked=102, Total=2862 [2022-03-20 12:50:05,273 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) [2022-03-20 12:50:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:09,468 INFO L93 Difference]: Finished difference Result 2366 states and 2996 transitions. [2022-03-20 12:50:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 12:50:09,469 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 [2022-03-20 12:50:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:09,473 INFO L225 Difference]: With dead ends: 2366 [2022-03-20 12:50:09,473 INFO L226 Difference]: Without dead ends: 1900 [2022-03-20 12:50:09,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=738, Invalid=6741, Unknown=7, NotChecked=170, Total=7656 [2022-03-20 12:50:09,475 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:09,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 94 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 12:50:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-03-20 12:50:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1712. [2022-03-20 12:50:10,982 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) [2022-03-20 12:50:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2160 transitions. [2022-03-20 12:50:10,985 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2160 transitions. Word has length 102 [2022-03-20 12:50:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:10,985 INFO L478 AbstractCegarLoop]: Abstraction has 1712 states and 2160 transitions. [2022-03-20 12:50:10,985 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) [2022-03-20 12:50:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2160 transitions. [2022-03-20 12:50:10,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:50:10,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:10,988 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] [2022-03-20 12:50:11,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 12:50:11,195 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 [2022-03-20 12:50:11,195 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 13 times [2022-03-20 12:50:11,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:11,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657203548] [2022-03-20 12:50:11,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:11,196 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:11,196 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 14 times [2022-03-20 12:50:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:11,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712421744] [2022-03-20 12:50:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:13,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 173 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 12:50:13,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712421744] [2022-03-20 12:50:13,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712421744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:13,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166659522] [2022-03-20 12:50:13,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:13,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:13,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:13,076 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) [2022-03-20 12:50:13,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 12:50:13,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 12:50:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:13,318 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 [2022-03-20 12:50:13,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:50:13,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:50:13,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:50:13,529 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 23 treesize of output 23 [2022-03-20 12:50:13,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:50:13,570 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 [2022-03-20 12:50:13,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:50:13,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:50:13,631 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 [2022-03-20 12:50:13,653 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 [2022-03-20 12:50:13,685 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 [2022-03-20 12:50:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:50:14,844 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 [2022-03-20 12:50:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 83 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:50:14,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:16,266 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 [2022-03-20 12:50:16,344 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 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 [2022-03-20 12:50:16,353 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 [2022-03-20 12:50:16,369 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 [2022-03-20 12:50:16,381 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 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)))) (not (< (mod (+ c_main_~i~0 2) 4294967296) 10))) is different from false [2022-03-20 12:50:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-03-20 12:50:16,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166659522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:16,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:16,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 23] total 66 [2022-03-20 12:50:16,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:16,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657203548] [2022-03-20 12:50:16,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657203548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:16,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:16,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 12:50:16,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789960622] [2022-03-20 12:50:16,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:16,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 12:50:16,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 12:50:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3267, Unknown=5, NotChecked=610, Total=4290 [2022-03-20 12:50:16,398 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) [2022-03-20 12:50:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:20,503 INFO L93 Difference]: Finished difference Result 2059 states and 2603 transitions. [2022-03-20 12:50:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 12:50:20,503 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 [2022-03-20 12:50:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:20,508 INFO L225 Difference]: With dead ends: 2059 [2022-03-20 12:50:20,508 INFO L226 Difference]: Without dead ends: 2017 [2022-03-20 12:50:20,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=779, Invalid=6718, Unknown=5, NotChecked=870, Total=8372 [2022-03-20 12:50:20,509 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 309 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:20,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 97 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:50:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-03-20 12:50:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1906. [2022-03-20 12:50:22,203 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) [2022-03-20 12:50:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2401 transitions. [2022-03-20 12:50:22,208 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2401 transitions. Word has length 102 [2022-03-20 12:50:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:22,208 INFO L478 AbstractCegarLoop]: Abstraction has 1906 states and 2401 transitions. [2022-03-20 12:50:22,208 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) [2022-03-20 12:50:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2401 transitions. [2022-03-20 12:50:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:50:22,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:22,211 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] [2022-03-20 12:50:22,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:22,427 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 [2022-03-20 12:50:22,427 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 15 times [2022-03-20 12:50:22,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:22,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522882082] [2022-03-20 12:50:22,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:22,429 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:22,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 16 times [2022-03-20 12:50:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:22,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152344502] [2022-03-20 12:50:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:22,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 12:50:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:22,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152344502] [2022-03-20 12:50:22,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152344502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:22,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797657314] [2022-03-20 12:50:22,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:22,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:22,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:22,644 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) [2022-03-20 12:50:22,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 12:50:22,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 12:50:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 12:50:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 12:50:23,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797657314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:23,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:23,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-03-20 12:50:23,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:23,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522882082] [2022-03-20 12:50:23,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522882082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:23,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:23,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:50:23,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539674208] [2022-03-20 12:50:23,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:23,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:50:23,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:23,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:50:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:50:23,584 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) [2022-03-20 12:50:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:35,290 INFO L93 Difference]: Finished difference Result 10879 states and 13573 transitions. [2022-03-20 12:50:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 12:50:35,291 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 [2022-03-20 12:50:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:35,315 INFO L225 Difference]: With dead ends: 10879 [2022-03-20 12:50:35,315 INFO L226 Difference]: Without dead ends: 10871 [2022-03-20 12:50:35,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 12:50:35,317 INFO L913 BasicCegarLoop]: 206 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2022-03-20 12:50:35,317 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] [2022-03-20 12:50:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2022-03-20 12:50:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 7361. [2022-03-20 12:50:42,372 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) [2022-03-20 12:50:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 9269 transitions. [2022-03-20 12:50:42,380 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 9269 transitions. Word has length 102 [2022-03-20 12:50:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:42,381 INFO L478 AbstractCegarLoop]: Abstraction has 7361 states and 9269 transitions. [2022-03-20 12:50:42,381 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) [2022-03-20 12:50:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 9269 transitions. [2022-03-20 12:50:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:50:42,390 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:42,391 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] [2022-03-20 12:50:42,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:42,595 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 [2022-03-20 12:50:42,595 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:42,596 INFO L85 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 17 times [2022-03-20 12:50:42,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:42,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217359349] [2022-03-20 12:50:42,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:42,597 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:42,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 18 times [2022-03-20 12:50:42,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337688220] [2022-03-20 12:50:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:42,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:44,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 88 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-03-20 12:50:44,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:44,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337688220] [2022-03-20 12:50:44,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337688220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:44,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595071480] [2022-03-20 12:50:44,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:44,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:44,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:44,055 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) [2022-03-20 12:50:44,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 12:50:44,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:50:44,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 12:50:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:50:45,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:50:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:50:45,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 12:50:45,538 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 [2022-03-20 12:50:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 92 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-20 12:50:45,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:46,256 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-03-20 12:50:46,256 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 [2022-03-20 12:50:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-20 12:50:46,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595071480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:46,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:46,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 54 [2022-03-20 12:50:46,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:46,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217359349] [2022-03-20 12:50:46,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217359349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:46,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:46,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 12:50:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770299965] [2022-03-20 12:50:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:46,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 12:50:46,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 12:50:46,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:50:46,901 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) [2022-03-20 12:50:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:55,547 INFO L93 Difference]: Finished difference Result 8826 states and 11122 transitions. [2022-03-20 12:50:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 12:50:55,547 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 [2022-03-20 12:50:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:55,562 INFO L225 Difference]: With dead ends: 8826 [2022-03-20 12:50:55,562 INFO L226 Difference]: Without dead ends: 7598 [2022-03-20 12:50:55,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 12:50:55,565 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 [2022-03-20 12:50:55,565 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] [2022-03-20 12:50:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2022-03-20 12:51:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 7119. [2022-03-20 12:51:02,353 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) [2022-03-20 12:51:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7119 states to 7119 states and 8936 transitions. [2022-03-20 12:51:02,361 INFO L78 Accepts]: Start accepts. Automaton has 7119 states and 8936 transitions. Word has length 102 [2022-03-20 12:51:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:02,361 INFO L478 AbstractCegarLoop]: Abstraction has 7119 states and 8936 transitions. [2022-03-20 12:51:02,361 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) [2022-03-20 12:51:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7119 states and 8936 transitions. [2022-03-20 12:51:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:51:02,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:02,370 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] [2022-03-20 12:51:02,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 12:51:02,574 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 [2022-03-20 12:51:02,575 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 19 times [2022-03-20 12:51:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:02,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485383307] [2022-03-20 12:51:02,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:02,576 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:02,576 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 20 times [2022-03-20 12:51:02,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:02,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673185535] [2022-03-20 12:51:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:02,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-03-20 12:51:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673185535] [2022-03-20 12:51:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673185535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811156440] [2022-03-20 12:51:03,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:03,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:03,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:03,214 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) [2022-03-20 12:51:03,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 12:51:03,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 12:51:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:04,115 INFO L356 Elim1Store]: treesize reduction 68, result has 48.9 percent of original size [2022-03-20 12:51:04,115 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 [2022-03-20 12:51:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 12:51:04,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:07,457 INFO L356 Elim1Store]: treesize reduction 147, result has 69.6 percent of original size [2022-03-20 12:51:07,458 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 [2022-03-20 12:52:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 12:52:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811156440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:49,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:49,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 16] total 41 [2022-03-20 12:52:49,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485383307] [2022-03-20 12:52:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485383307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:49,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:49,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:52:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976138551] [2022-03-20 12:52:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:49,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:52:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:52:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 12:52:49,469 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) [2022-03-20 12:52:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:57,694 INFO L93 Difference]: Finished difference Result 9390 states and 11728 transitions. [2022-03-20 12:52:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:52:57,695 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 [2022-03-20 12:52:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:57,706 INFO L225 Difference]: With dead ends: 9390 [2022-03-20 12:52:57,706 INFO L226 Difference]: Without dead ends: 7708 [2022-03-20 12:52:57,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 12:52:57,710 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 [2022-03-20 12:52:57,710 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] [2022-03-20 12:52:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2022-03-20 12:53:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7623. [2022-03-20 12:53:05,259 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) [2022-03-20 12:53:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7623 states to 7623 states and 9509 transitions. [2022-03-20 12:53:05,267 INFO L78 Accepts]: Start accepts. Automaton has 7623 states and 9509 transitions. Word has length 102 [2022-03-20 12:53:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:05,268 INFO L478 AbstractCegarLoop]: Abstraction has 7623 states and 9509 transitions. [2022-03-20 12:53:05,268 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) [2022-03-20 12:53:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7623 states and 9509 transitions. [2022-03-20 12:53:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:53:05,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:05,277 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] [2022-03-20 12:53:05,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:05,495 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 [2022-03-20 12:53:05,495 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:05,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1367385464, now seen corresponding path program 21 times [2022-03-20 12:53:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:05,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616177672] [2022-03-20 12:53:05,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:05,497 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:05,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1367385464, now seen corresponding path program 22 times [2022-03-20 12:53:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:05,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904845443] [2022-03-20 12:53:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 12:53:06,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:06,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904845443] [2022-03-20 12:53:06,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904845443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471296765] [2022-03-20 12:53:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:53:06,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:06,035 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) [2022-03-20 12:53:06,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 12:53:06,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:53:06,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 12:53:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:06,388 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 [2022-03-20 12:53:06,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,460 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 [2022-03-20 12:53:06,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:06,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:53:07,109 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 [2022-03-20 12:53:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:53:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:08,025 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 [2022-03-20 12:53:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 12:53:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471296765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:08,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 41 [2022-03-20 12:53:08,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616177672] [2022-03-20 12:53:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616177672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:08,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:53:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778692880] [2022-03-20 12:53:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:08,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:53:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:53:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1398, Unknown=1, NotChecked=76, Total=1640 [2022-03-20 12:53:08,150 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) [2022-03-20 12:53:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:16,148 INFO L93 Difference]: Finished difference Result 10852 states and 13447 transitions. [2022-03-20 12:53:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:53:16,148 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 [2022-03-20 12:53:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:16,160 INFO L225 Difference]: With dead ends: 10852 [2022-03-20 12:53:16,160 INFO L226 Difference]: Without dead ends: 7014 [2022-03-20 12:53:16,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=2394, Unknown=1, NotChecked=100, Total=2756 [2022-03-20 12:53:16,166 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 [2022-03-20 12:53:16,166 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] [2022-03-20 12:53:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2022-03-20 12:53:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6463. [2022-03-20 12:53:22,815 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) [2022-03-20 12:53:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 8011 transitions. [2022-03-20 12:53:22,822 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 8011 transitions. Word has length 102 [2022-03-20 12:53:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:22,822 INFO L478 AbstractCegarLoop]: Abstraction has 6463 states and 8011 transitions. [2022-03-20 12:53:22,822 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) [2022-03-20 12:53:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 8011 transitions. [2022-03-20 12:53:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:53:22,831 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:22,831 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] [2022-03-20 12:53:22,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:23,044 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 [2022-03-20 12:53:23,044 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash -67154106, now seen corresponding path program 23 times [2022-03-20 12:53:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1737581760] [2022-03-20 12:53:23,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:23,046 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:23,046 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -67154106, now seen corresponding path program 24 times [2022-03-20 12:53:23,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:23,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365348039] [2022-03-20 12:53:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:23,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:25,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 12:53:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365348039] [2022-03-20 12:53:25,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365348039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57406457] [2022-03-20 12:53:25,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:53:25,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:25,316 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) [2022-03-20 12:53:25,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 12:53:26,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:53:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 12:53:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:53:45,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:53:45,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:53:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:53:45,229 INFO L356 Elim1Store]: treesize reduction 162, result has 31.9 percent of original size [2022-03-20 12:53:45,229 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 [2022-03-20 12:53:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 121 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 12:53:45,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:56,928 INFO L356 Elim1Store]: treesize reduction 190, result has 58.6 percent of original size [2022-03-20 12:53:56,929 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 [2022-03-20 12:54:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 12:54:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57406457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:00,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 30] total 83 [2022-03-20 12:54:00,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1737581760] [2022-03-20 12:54:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1737581760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:00,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 12:54:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302662663] [2022-03-20 12:54:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:00,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 12:54:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 12:54:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=5981, Unknown=6, NotChecked=0, Total=6806 [2022-03-20 12:54:00,866 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) [2022-03-20 12:54:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:13,818 INFO L93 Difference]: Finished difference Result 9134 states and 11321 transitions. [2022-03-20 12:54:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 12:54:13,819 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 [2022-03-20 12:54:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:13,832 INFO L225 Difference]: With dead ends: 9134 [2022-03-20 12:54:13,833 INFO L226 Difference]: Without dead ends: 8959 [2022-03-20 12:54:13,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3837 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1412, Invalid=11014, Unknown=6, NotChecked=0, Total=12432 [2022-03-20 12:54:13,835 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 288 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2022-03-20 12:54:13,835 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] [2022-03-20 12:54:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2022-03-20 12:54:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 6481. [2022-03-20 12:54:20,624 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) [2022-03-20 12:54:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 8033 transitions. [2022-03-20 12:54:20,632 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 8033 transitions. Word has length 102 [2022-03-20 12:54:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:20,632 INFO L478 AbstractCegarLoop]: Abstraction has 6481 states and 8033 transitions. [2022-03-20 12:54:20,632 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) [2022-03-20 12:54:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 8033 transitions. [2022-03-20 12:54:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:54:20,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:20,640 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] [2022-03-20 12:54:20,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 12:54:20,842 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 [2022-03-20 12:54:20,843 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -460181116, now seen corresponding path program 25 times [2022-03-20 12:54:20,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:20,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334733036] [2022-03-20 12:54:20,844 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:20,844 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:20,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -460181116, now seen corresponding path program 26 times [2022-03-20 12:54:20,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:20,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376201658] [2022-03-20 12:54:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:20,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 12:54:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376201658] [2022-03-20 12:54:21,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376201658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605050816] [2022-03-20 12:54:21,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:54:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:21,332 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) [2022-03-20 12:54:21,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 12:54:21,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:54:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:21,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 12:54:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:21,614 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 [2022-03-20 12:54:21,646 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 23 treesize of output 23 [2022-03-20 12:54:21,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:21,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:21,717 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 [2022-03-20 12:54:21,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:21,753 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 [2022-03-20 12:54:21,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:21,790 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 [2022-03-20 12:54:21,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:21,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:21,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:22,587 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:54:22,587 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 [2022-03-20 12:54:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 12:54:22,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:36,204 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 [2022-03-20 12:54:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-20 12:54:36,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605050816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:36,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:36,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 18] total 43 [2022-03-20 12:54:36,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334733036] [2022-03-20 12:54:36,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334733036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:36,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:36,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:54:36,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127137131] [2022-03-20 12:54:36,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:36,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:54:36,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:54:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1453, Unknown=10, NotChecked=80, Total=1806 [2022-03-20 12:54:36,329 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) [2022-03-20 12:54:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:43,909 INFO L93 Difference]: Finished difference Result 9325 states and 11523 transitions. [2022-03-20 12:54:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:54:43,909 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 [2022-03-20 12:54:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:43,920 INFO L225 Difference]: With dead ends: 9325 [2022-03-20 12:54:43,920 INFO L226 Difference]: Without dead ends: 6153 [2022-03-20 12:54:43,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=337, Invalid=2309, Unknown=10, NotChecked=100, Total=2756 [2022-03-20 12:54:43,925 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 [2022-03-20 12:54:43,925 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] [2022-03-20 12:54:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-03-20 12:54:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 6068. [2022-03-20 12:54:50,455 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) [2022-03-20 12:54:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 7477 transitions. [2022-03-20 12:54:50,461 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 7477 transitions. Word has length 102 [2022-03-20 12:54:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:50,461 INFO L478 AbstractCegarLoop]: Abstraction has 6068 states and 7477 transitions. [2022-03-20 12:54:50,461 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) [2022-03-20 12:54:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 7477 transitions. [2022-03-20 12:54:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:54:50,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:50,468 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] [2022-03-20 12:54:50,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 12:54:50,683 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 [2022-03-20 12:54:50,683 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1297013632, now seen corresponding path program 27 times [2022-03-20 12:54:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:50,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [939281285] [2022-03-20 12:54:50,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:50,685 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:50,685 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1297013632, now seen corresponding path program 28 times [2022-03-20 12:54:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:50,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031946885] [2022-03-20 12:54:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:54:51,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031946885] [2022-03-20 12:54:51,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031946885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813138214] [2022-03-20 12:54:51,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:54:51,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:51,174 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) [2022-03-20 12:54:51,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 12:54:51,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:54:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 12:54:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:51,475 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 [2022-03-20 12:54:51,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,632 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 [2022-03-20 12:54:51,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,707 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 [2022-03-20 12:54:51,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:54:51,752 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 [2022-03-20 12:54:52,523 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:54:52,523 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 [2022-03-20 12:54:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 46 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-03-20 12:54:52,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:54,065 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 [2022-03-20 12:54:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-20 12:54:54,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813138214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:54,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:54,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-03-20 12:54:54,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:54,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [939281285] [2022-03-20 12:54:54,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [939281285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:54,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:54,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:54:54,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173315763] [2022-03-20 12:54:54,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:54,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:54:54,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:54:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1254, Unknown=1, NotChecked=72, Total=1482 [2022-03-20 12:54:54,415 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) [2022-03-20 12:55:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:01,532 INFO L93 Difference]: Finished difference Result 8233 states and 10105 transitions. [2022-03-20 12:55:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:55:01,542 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 [2022-03-20 12:55:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:01,548 INFO L225 Difference]: With dead ends: 8233 [2022-03-20 12:55:01,548 INFO L226 Difference]: Without dead ends: 5621 [2022-03-20 12:55:01,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=236, Invalid=2119, Unknown=1, NotChecked=94, Total=2450 [2022-03-20 12:55:01,553 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 172 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-20 12:55:01,553 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] [2022-03-20 12:55:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2022-03-20 12:55:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5480. [2022-03-20 12:55:07,599 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) [2022-03-20 12:55:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 6744 transitions. [2022-03-20 12:55:07,604 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 6744 transitions. Word has length 102 [2022-03-20 12:55:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:07,604 INFO L478 AbstractCegarLoop]: Abstraction has 5480 states and 6744 transitions. [2022-03-20 12:55:07,604 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) [2022-03-20 12:55:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 6744 transitions. [2022-03-20 12:55:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:55:07,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:07,610 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] [2022-03-20 12:55:07,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 12:55:07,810 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 [2022-03-20 12:55:07,810 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash -407448828, now seen corresponding path program 29 times [2022-03-20 12:55:07,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:07,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589238600] [2022-03-20 12:55:07,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:07,812 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:07,812 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash -407448828, now seen corresponding path program 30 times [2022-03-20 12:55:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772092133] [2022-03-20 12:55:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:07,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:08,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 12:55:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772092133] [2022-03-20 12:55:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772092133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139989032] [2022-03-20 12:55:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:55:08,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:08,934 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) [2022-03-20 12:55:08,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 12:55:10,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:55:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 12:55:10,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:10,883 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 [2022-03-20 12:55:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:55:11,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 12:55:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:55:11,871 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 12:55:11,872 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 [2022-03-20 12:55:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 86 proven. 103 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 12:55:11,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-03-20 12:55:14,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139989032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:14,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:14,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 23] total 63 [2022-03-20 12:55:14,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589238600] [2022-03-20 12:55:14,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589238600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:14,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:14,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 12:55:14,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422157955] [2022-03-20 12:55:14,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:14,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 12:55:14,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:14,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 12:55:14,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 12:55:14,177 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) [2022-03-20 12:55:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:22,093 INFO L93 Difference]: Finished difference Result 7561 states and 9199 transitions. [2022-03-20 12:55:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:55:22,093 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 [2022-03-20 12:55:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:22,100 INFO L225 Difference]: With dead ends: 7561 [2022-03-20 12:55:22,101 INFO L226 Difference]: Without dead ends: 6118 [2022-03-20 12:55:22,103 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 [2022-03-20 12:55:22,104 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 [2022-03-20 12:55:22,104 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] [2022-03-20 12:55:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2022-03-20 12:55:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 5136. [2022-03-20 12:55:27,692 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) [2022-03-20 12:55:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 6221 transitions. [2022-03-20 12:55:27,697 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 6221 transitions. Word has length 102 [2022-03-20 12:55:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:27,697 INFO L478 AbstractCegarLoop]: Abstraction has 5136 states and 6221 transitions. [2022-03-20 12:55:27,697 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) [2022-03-20 12:55:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 6221 transitions. [2022-03-20 12:55:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:55:27,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:27,703 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] [2022-03-20 12:55:27,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 12:55:27,903 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 [2022-03-20 12:55:27,903 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 31 times [2022-03-20 12:55:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:27,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372406597] [2022-03-20 12:55:27,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:27,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:27,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 32 times [2022-03-20 12:55:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993084792] [2022-03-20 12:55:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 183 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-20 12:55:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993084792] [2022-03-20 12:55:29,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993084792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:29,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825099377] [2022-03-20 12:55:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:55:29,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:29,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:29,893 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) [2022-03-20 12:55:29,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 12:55:30,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:55:30,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 12:55:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:30,236 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 [2022-03-20 12:55:30,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,458 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 25 treesize of output 25 [2022-03-20 12:55:30,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:55:30,588 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 25 treesize of output 25 [2022-03-20 12:55:31,568 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:55:31,569 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 [2022-03-20 12:55:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 12:55:31,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:45,402 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 [2022-03-20 12:55:45,490 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 [2022-03-20 12:55:45,500 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 [2022-03-20 12:55:45,517 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 2) 4294967296) 10))) is different from false [2022-03-20 12:55:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 11 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-03-20 12:55:45,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825099377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:45,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:45,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 21] total 63 [2022-03-20 12:55:45,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:45,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372406597] [2022-03-20 12:55:45,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372406597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:45,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:45,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 12:55:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231232167] [2022-03-20 12:55:45,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:45,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 12:55:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 12:55:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=3073, Unknown=12, NotChecked=468, Total=3906 [2022-03-20 12:55:45,540 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) [2022-03-20 12:55:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:54,689 INFO L93 Difference]: Finished difference Result 6315 states and 7710 transitions. [2022-03-20 12:55:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 12:55:54,690 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 [2022-03-20 12:55:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:54,696 INFO L225 Difference]: With dead ends: 6315 [2022-03-20 12:55:54,696 INFO L226 Difference]: Without dead ends: 6125 [2022-03-20 12:55:54,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=745, Invalid=6741, Unknown=12, NotChecked=692, Total=8190 [2022-03-20 12:55:54,698 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 [2022-03-20 12:55:54,698 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] [2022-03-20 12:55:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2022-03-20 12:56:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 5598. [2022-03-20 12:56:00,592 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) [2022-03-20 12:56:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 6775 transitions. [2022-03-20 12:56:00,597 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 6775 transitions. Word has length 102 [2022-03-20 12:56:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:00,598 INFO L478 AbstractCegarLoop]: Abstraction has 5598 states and 6775 transitions. [2022-03-20 12:56:00,598 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) [2022-03-20 12:56:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 6775 transitions. [2022-03-20 12:56:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:56:00,603 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:00,603 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] [2022-03-20 12:56:00,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 12:56:00,803 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 [2022-03-20 12:56:00,803 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 33 times [2022-03-20 12:56:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:00,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1464900895] [2022-03-20 12:56:00,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:00,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:00,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 34 times [2022-03-20 12:56:00,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:00,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701398253] [2022-03-20 12:56:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:01,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 12:56:01,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:01,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701398253] [2022-03-20 12:56:01,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701398253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:01,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444645125] [2022-03-20 12:56:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:56:01,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:01,997 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) [2022-03-20 12:56:01,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 12:56:02,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:56:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:02,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 12:56:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:02,292 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 [2022-03-20 12:56:02,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,389 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 [2022-03-20 12:56:02,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,429 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 [2022-03-20 12:56:02,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,491 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 [2022-03-20 12:56:02,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:02,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:03,241 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 [2022-03-20 12:56:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 46 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:56:03,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:03,968 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 [2022-03-20 12:56:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 54 proven. 4 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-03-20 12:56:04,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444645125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:04,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:04,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 14] total 42 [2022-03-20 12:56:04,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:04,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1464900895] [2022-03-20 12:56:04,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1464900895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:04,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:04,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:56:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100756781] [2022-03-20 12:56:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:04,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:56:04,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:56:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1408, Unknown=1, NotChecked=78, Total=1722 [2022-03-20 12:56:04,097 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) [2022-03-20 12:56:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:56:11,601 INFO L93 Difference]: Finished difference Result 6653 states and 8036 transitions. [2022-03-20 12:56:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:56:11,601 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 [2022-03-20 12:56:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:56:11,608 INFO L225 Difference]: With dead ends: 6653 [2022-03-20 12:56:11,608 INFO L226 Difference]: Without dead ends: 6318 [2022-03-20 12:56:11,609 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 [2022-03-20 12:56:11,609 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 [2022-03-20 12:56:11,609 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] [2022-03-20 12:56:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2022-03-20 12:56:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5574. [2022-03-20 12:56:17,431 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) [2022-03-20 12:56:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 6735 transitions. [2022-03-20 12:56:17,436 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 6735 transitions. Word has length 102 [2022-03-20 12:56:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:17,436 INFO L478 AbstractCegarLoop]: Abstraction has 5574 states and 6735 transitions. [2022-03-20 12:56:17,436 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) [2022-03-20 12:56:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 6735 transitions. [2022-03-20 12:56:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:56:17,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:17,440 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] [2022-03-20 12:56:17,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 12:56:17,641 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 [2022-03-20 12:56:17,641 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 35 times [2022-03-20 12:56:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:17,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662369703] [2022-03-20 12:56:17,642 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:17,642 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:17,642 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 36 times [2022-03-20 12:56:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360529265] [2022-03-20 12:56:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 12:56:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:18,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360529265] [2022-03-20 12:56:18,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360529265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:18,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046327160] [2022-03-20 12:56:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:56:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:18,245 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) [2022-03-20 12:56:18,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 12:56:19,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:56:19,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 12:56:19,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:19,986 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:56:19,987 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 [2022-03-20 12:56:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 60 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 12:56:20,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:21,192 INFO L356 Elim1Store]: treesize reduction 116, result has 65.0 percent of original size [2022-03-20 12:56:21,193 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 [2022-03-20 12:56:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 12:56:21,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046327160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:21,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:21,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 43 [2022-03-20 12:56:21,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662369703] [2022-03-20 12:56:21,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662369703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:21,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:21,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:56:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332162354] [2022-03-20 12:56:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:21,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:56:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:56:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:56:21,788 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) [2022-03-20 12:56:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:56:29,018 INFO L93 Difference]: Finished difference Result 8030 states and 9694 transitions. [2022-03-20 12:56:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:56:29,019 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 [2022-03-20 12:56:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:56:29,025 INFO L225 Difference]: With dead ends: 8030 [2022-03-20 12:56:29,026 INFO L226 Difference]: Without dead ends: 6148 [2022-03-20 12:56:29,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:56:29,029 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:56:29,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:56:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2022-03-20 12:56:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 6078. [2022-03-20 12:56:35,397 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) [2022-03-20 12:56:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 7286 transitions. [2022-03-20 12:56:35,403 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 7286 transitions. Word has length 102 [2022-03-20 12:56:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:35,403 INFO L478 AbstractCegarLoop]: Abstraction has 6078 states and 7286 transitions. [2022-03-20 12:56:35,403 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) [2022-03-20 12:56:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 7286 transitions. [2022-03-20 12:56:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:56:35,408 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:35,408 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] [2022-03-20 12:56:35,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 12:56:35,609 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 [2022-03-20 12:56:35,609 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 37 times [2022-03-20 12:56:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [50591787] [2022-03-20 12:56:35,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:35,610 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:35,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 38 times [2022-03-20 12:56:35,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:35,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141261890] [2022-03-20 12:56:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:35,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 12:56:36,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:36,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141261890] [2022-03-20 12:56:36,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141261890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:36,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203606383] [2022-03-20 12:56:36,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:56:36,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:36,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:36,107 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) [2022-03-20 12:56:36,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 12:56:36,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:56:36,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 12:56:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:36,336 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 [2022-03-20 12:56:36,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,417 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 [2022-03-20 12:56:36,462 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 [2022-03-20 12:56:36,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:36,641 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 [2022-03-20 12:56:36,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:37,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:56:37,651 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 [2022-03-20 12:56:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 12:56:37,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:38,734 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 [2022-03-20 12:56:38,818 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 [2022-03-20 12:56:38,828 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 [2022-03-20 12:56:38,846 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 [2022-03-20 12:56:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-20 12:56:38,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203606383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:38,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:38,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 47 [2022-03-20 12:56:38,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [50591787] [2022-03-20 12:56:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [50591787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:38,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:38,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:56:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240785615] [2022-03-20 12:56:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:38,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:56:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:38,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:56:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1583, Unknown=4, NotChecked=340, Total=2162 [2022-03-20 12:56:38,872 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) [2022-03-20 12:56:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:56:45,745 INFO L93 Difference]: Finished difference Result 8650 states and 10374 transitions. [2022-03-20 12:56:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:56:45,746 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 [2022-03-20 12:56:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:56:45,752 INFO L225 Difference]: With dead ends: 8650 [2022-03-20 12:56:45,752 INFO L226 Difference]: Without dead ends: 5459 [2022-03-20 12:56:45,755 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 [2022-03-20 12:56:45,756 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 [2022-03-20 12:56:45,756 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] [2022-03-20 12:56:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-03-20 12:56:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5373. [2022-03-20 12:56:51,504 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) [2022-03-20 12:56:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 6429 transitions. [2022-03-20 12:56:51,509 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 6429 transitions. Word has length 102 [2022-03-20 12:56:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:51,510 INFO L478 AbstractCegarLoop]: Abstraction has 5373 states and 6429 transitions. [2022-03-20 12:56:51,510 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) [2022-03-20 12:56:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 6429 transitions. [2022-03-20 12:56:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:56:51,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:51,514 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] [2022-03-20 12:56:51,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 12:56:51,714 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 [2022-03-20 12:56:51,715 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 39 times [2022-03-20 12:56:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:51,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643115753] [2022-03-20 12:56:51,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:51,716 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:51,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 40 times [2022-03-20 12:56:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712168898] [2022-03-20 12:56:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:51,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:53,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 214 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-20 12:56:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:53,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712168898] [2022-03-20 12:56:53,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712168898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:53,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953284751] [2022-03-20 12:56:53,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:56:53,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:53,574 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) [2022-03-20 12:56:53,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 12:56:53,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:56:53,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 12:56:53,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:53,942 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 [2022-03-20 12:56:53,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:54,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:54,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:54,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:54,169 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 [2022-03-20 12:56:54,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:54,198 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 23 treesize of output 23 [2022-03-20 12:56:54,213 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 [2022-03-20 12:56:54,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:54,243 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 [2022-03-20 12:56:54,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:56:55,135 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:56:55,135 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 [2022-03-20 12:56:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 93 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-20 12:56:55,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:56,832 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 [2022-03-20 12:56:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 106 proven. 14 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 12:56:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953284751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:57,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:57,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 17] total 55 [2022-03-20 12:56:57,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643115753] [2022-03-20 12:56:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643115753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:57,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:57,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:56:57,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579563612] [2022-03-20 12:56:57,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:57,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:56:57,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:56:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2585, Unknown=1, NotChecked=104, Total=2970 [2022-03-20 12:56:57,216 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) [2022-03-20 12:57:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:07,637 INFO L93 Difference]: Finished difference Result 8065 states and 9648 transitions. [2022-03-20 12:57:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 12:57:07,638 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 [2022-03-20 12:57:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:07,646 INFO L225 Difference]: With dead ends: 8065 [2022-03-20 12:57:07,646 INFO L226 Difference]: Without dead ends: 7890 [2022-03-20 12:57:07,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=541, Invalid=5314, Unknown=1, NotChecked=150, Total=6006 [2022-03-20 12:57:07,647 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 [2022-03-20 12:57:07,647 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] [2022-03-20 12:57:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2022-03-20 12:57:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 6012. [2022-03-20 12:57:14,198 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) [2022-03-20 12:57:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7207 transitions. [2022-03-20 12:57:14,204 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7207 transitions. Word has length 102 [2022-03-20 12:57:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:14,204 INFO L478 AbstractCegarLoop]: Abstraction has 6012 states and 7207 transitions. [2022-03-20 12:57:14,204 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) [2022-03-20 12:57:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7207 transitions. [2022-03-20 12:57:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:57:14,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:14,208 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] [2022-03-20 12:57:14,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 12:57:14,409 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 [2022-03-20 12:57:14,409 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 41 times [2022-03-20 12:57:14,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:14,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201461205] [2022-03-20 12:57:14,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:14,410 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:14,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 42 times [2022-03-20 12:57:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853205846] [2022-03-20 12:57:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:14,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:14,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 12:57:14,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:14,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853205846] [2022-03-20 12:57:14,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853205846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906644170] [2022-03-20 12:57:14,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:57:14,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:14,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:14,934 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) [2022-03-20 12:57:14,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 12:57:15,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 12:57:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 12:57:15,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:15,814 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 [2022-03-20 12:57:15,851 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 [2022-03-20 12:57:15,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:15,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:15,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:15,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:15,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:16,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:16,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:16,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:16,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:16,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:57:16,438 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 [2022-03-20 12:57:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-20 12:57:16,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:17,214 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 [2022-03-20 12:57:17,311 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 [2022-03-20 12:57:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 294 trivial. 10 not checked. [2022-03-20 12:57:17,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906644170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:17,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:17,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 14] total 37 [2022-03-20 12:57:17,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201461205] [2022-03-20 12:57:17,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201461205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:17,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:17,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:57:17,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918575093] [2022-03-20 12:57:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:17,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:57:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:57:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1043, Unknown=2, NotChecked=134, Total=1332 [2022-03-20 12:57:17,327 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) [2022-03-20 12:57:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:24,295 INFO L93 Difference]: Finished difference Result 8590 states and 10300 transitions. [2022-03-20 12:57:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:57:24,295 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 [2022-03-20 12:57:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:24,301 INFO L225 Difference]: With dead ends: 8590 [2022-03-20 12:57:24,301 INFO L226 Difference]: Without dead ends: 5504 [2022-03-20 12:57:24,305 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 [2022-03-20 12:57:24,305 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 [2022-03-20 12:57:24,305 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] [2022-03-20 12:57:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-03-20 12:57:30,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 5402. [2022-03-20 12:57:30,252 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) [2022-03-20 12:57:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 6450 transitions. [2022-03-20 12:57:30,257 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 6450 transitions. Word has length 102 [2022-03-20 12:57:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:30,257 INFO L478 AbstractCegarLoop]: Abstraction has 5402 states and 6450 transitions. [2022-03-20 12:57:30,257 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) [2022-03-20 12:57:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 6450 transitions. [2022-03-20 12:57:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:57:30,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:30,261 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] [2022-03-20 12:57:30,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 12:57:30,461 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 [2022-03-20 12:57:30,461 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 43 times [2022-03-20 12:57:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:30,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [468078004] [2022-03-20 12:57:30,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:30,463 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:30,463 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 44 times [2022-03-20 12:57:30,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:30,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334040543] [2022-03-20 12:57:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 12:57:31,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334040543] [2022-03-20 12:57:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334040543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291007646] [2022-03-20 12:57:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:57:31,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:31,077 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) [2022-03-20 12:57:31,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 12:57:31,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:57:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 12:57:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:31,404 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 [2022-03-20 12:57:31,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,538 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 [2022-03-20 12:57:31,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:31,593 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 [2022-03-20 12:57:31,610 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 [2022-03-20 12:57:31,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:57:32,283 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:57:32,283 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 [2022-03-20 12:57:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 12:57:32,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:47,441 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 [2022-03-20 12:57:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-20 12:57:47,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291007646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:47,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:47,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 41 [2022-03-20 12:57:47,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:47,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [468078004] [2022-03-20 12:57:47,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [468078004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:47,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:47,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:57:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239951050] [2022-03-20 12:57:47,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:47,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:57:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:57:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1347, Unknown=8, NotChecked=76, Total=1640 [2022-03-20 12:57:47,554 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) [2022-03-20 12:57:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:54,914 INFO L93 Difference]: Finished difference Result 5700 states and 6819 transitions. [2022-03-20 12:57:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:57:54,914 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 [2022-03-20 12:57:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:54,919 INFO L225 Difference]: With dead ends: 5700 [2022-03-20 12:57:54,919 INFO L226 Difference]: Without dead ends: 5547 [2022-03-20 12:57:54,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=298, Invalid=2454, Unknown=8, NotChecked=102, Total=2862 [2022-03-20 12:57:54,920 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 [2022-03-20 12:57:54,921 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] [2022-03-20 12:57:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2022-03-20 12:58:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 5492. [2022-03-20 12:58:00,965 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) [2022-03-20 12:58:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 6555 transitions. [2022-03-20 12:58:00,970 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 6555 transitions. Word has length 102 [2022-03-20 12:58:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:00,970 INFO L478 AbstractCegarLoop]: Abstraction has 5492 states and 6555 transitions. [2022-03-20 12:58:00,971 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) [2022-03-20 12:58:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 6555 transitions. [2022-03-20 12:58:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:58:00,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:00,975 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] [2022-03-20 12:58:00,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-20 12:58:01,175 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 [2022-03-20 12:58:01,175 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 45 times [2022-03-20 12:58:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379828465] [2022-03-20 12:58:01,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:01,177 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:01,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 46 times [2022-03-20 12:58:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:01,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137582020] [2022-03-20 12:58:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:01,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-20 12:58:02,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:02,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137582020] [2022-03-20 12:58:02,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137582020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:02,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059053099] [2022-03-20 12:58:02,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:58:02,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:02,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:02,767 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) [2022-03-20 12:58:02,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 12:58:03,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:58:03,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 12:58:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:03,051 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 [2022-03-20 12:58:03,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:03,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 12:58:04,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:04,927 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 [2022-03-20 12:58:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-20 12:58:05,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059053099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:05,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:05,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 15] total 51 [2022-03-20 12:58:05,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:05,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379828465] [2022-03-20 12:58:05,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379828465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:05,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:05,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:58:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546729818] [2022-03-20 12:58:05,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:05,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:58:05,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:58:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2158, Unknown=1, NotChecked=96, Total=2550 [2022-03-20 12:58:05,040 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) [2022-03-20 12:58:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:14,104 INFO L93 Difference]: Finished difference Result 7060 states and 8472 transitions. [2022-03-20 12:58:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:58:14,104 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 [2022-03-20 12:58:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:14,110 INFO L225 Difference]: With dead ends: 7060 [2022-03-20 12:58:14,110 INFO L226 Difference]: Without dead ends: 6116 [2022-03-20 12:58:14,112 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 [2022-03-20 12:58:14,112 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 [2022-03-20 12:58:14,112 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] [2022-03-20 12:58:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-03-20 12:58:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5424. [2022-03-20 12:58:20,133 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) [2022-03-20 12:58:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6462 transitions. [2022-03-20 12:58:20,137 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6462 transitions. Word has length 102 [2022-03-20 12:58:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:20,138 INFO L478 AbstractCegarLoop]: Abstraction has 5424 states and 6462 transitions. [2022-03-20 12:58:20,138 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) [2022-03-20 12:58:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6462 transitions. [2022-03-20 12:58:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:58:20,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:20,143 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] [2022-03-20 12:58:20,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 12:58:20,355 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 [2022-03-20 12:58:20,355 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 47 times [2022-03-20 12:58:20,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:20,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674814690] [2022-03-20 12:58:20,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:20,357 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:20,357 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 48 times [2022-03-20 12:58:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:20,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60791088] [2022-03-20 12:58:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-20 12:58:20,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60791088] [2022-03-20 12:58:20,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60791088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568547402] [2022-03-20 12:58:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:58:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:20,970 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) [2022-03-20 12:58:20,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 12:58:21,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 12:58:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:21,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 12:58:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:22,439 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-20 12:58:22,439 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 [2022-03-20 12:58:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 60 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 12:58:22,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:23,599 INFO L356 Elim1Store]: treesize reduction 116, result has 65.0 percent of original size [2022-03-20 12:58:23,599 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 [2022-03-20 12:58:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-20 12:58:24,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568547402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:24,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:24,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16] total 42 [2022-03-20 12:58:24,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:24,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674814690] [2022-03-20 12:58:24,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674814690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:24,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:24,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:58:24,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477060228] [2022-03-20 12:58:24,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:24,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:58:24,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:24,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:58:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:58:24,197 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) [2022-03-20 12:58:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:31,383 INFO L93 Difference]: Finished difference Result 7481 states and 8920 transitions. [2022-03-20 12:58:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:58:31,384 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 [2022-03-20 12:58:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:31,389 INFO L225 Difference]: With dead ends: 7481 [2022-03-20 12:58:31,390 INFO L226 Difference]: Without dead ends: 5660 [2022-03-20 12:58:31,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:58:31,392 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 [2022-03-20 12:58:31,392 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] [2022-03-20 12:58:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5660 states. [2022-03-20 12:58:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5660 to 5499. [2022-03-20 12:58:37,555 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) [2022-03-20 12:58:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6531 transitions. [2022-03-20 12:58:37,559 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6531 transitions. Word has length 102 [2022-03-20 12:58:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:37,559 INFO L478 AbstractCegarLoop]: Abstraction has 5499 states and 6531 transitions. [2022-03-20 12:58:37,560 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) [2022-03-20 12:58:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6531 transitions. [2022-03-20 12:58:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:58:37,564 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:37,564 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] [2022-03-20 12:58:37,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 12:58:37,769 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 [2022-03-20 12:58:37,770 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:37,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 49 times [2022-03-20 12:58:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:37,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [166107160] [2022-03-20 12:58:37,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:37,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:37,771 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 50 times [2022-03-20 12:58:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:37,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020518030] [2022-03-20 12:58:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:37,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:38,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-20 12:58:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:38,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020518030] [2022-03-20 12:58:38,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020518030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:38,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590527538] [2022-03-20 12:58:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:58:38,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:38,240 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) [2022-03-20 12:58:38,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 12:58:38,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:58:38,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 12:58:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:38,533 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 [2022-03-20 12:58:38,559 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 [2022-03-20 12:58:38,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,720 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 [2022-03-20 12:58:38,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,750 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 23 treesize of output 23 [2022-03-20 12:58:38,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:58:38,790 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 [2022-03-20 12:58:39,688 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:58:39,689 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 [2022-03-20 12:58:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 101 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-03-20 12:58:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:00,968 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 [2022-03-20 12:59:01,049 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 [2022-03-20 12:59:01,059 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 [2022-03-20 12:59:01,235 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)))))) (not (< (mod (+ c_main_~i~0 2) 4294967296) 10))) is different from false [2022-03-20 12:59:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 178 trivial. 44 not checked. [2022-03-20 12:59:01,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590527538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:01,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:01,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 25] total 56 [2022-03-20 12:59:01,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [166107160] [2022-03-20 12:59:01,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [166107160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:01,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:01,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:59:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682182827] [2022-03-20 12:59:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:01,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:59:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:59:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=2242, Unknown=16, NotChecked=412, Total=3080 [2022-03-20 12:59:01,261 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) [2022-03-20 12:59:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:08,047 INFO L93 Difference]: Finished difference Result 8115 states and 9646 transitions. [2022-03-20 12:59:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:59:08,047 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 [2022-03-20 12:59:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:08,053 INFO L225 Difference]: With dead ends: 8115 [2022-03-20 12:59:08,053 INFO L226 Difference]: Without dead ends: 5176 [2022-03-20 12:59:08,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=510, Invalid=3522, Unknown=16, NotChecked=508, Total=4556 [2022-03-20 12:59:08,057 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 [2022-03-20 12:59:08,057 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] [2022-03-20 12:59:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2022-03-20 12:59:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4970. [2022-03-20 12:59:13,628 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) [2022-03-20 12:59:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-20 12:59:13,632 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-20 12:59:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:13,632 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-20 12:59:13,632 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) [2022-03-20 12:59:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-20 12:59:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:59:13,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:13,636 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] [2022-03-20 12:59:13,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 12:59:13,836 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 [2022-03-20 12:59:13,836 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 51 times [2022-03-20 12:59:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:13,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [140738698] [2022-03-20 12:59:13,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:13,838 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:13,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 52 times [2022-03-20 12:59:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:13,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577903203] [2022-03-20 12:59:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:13,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 12:59:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577903203] [2022-03-20 12:59:14,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577903203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856658658] [2022-03-20 12:59:14,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:14,464 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) [2022-03-20 12:59:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 12:59:14,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:14,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 12:59:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:14,801 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 [2022-03-20 12:59:14,834 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 23 treesize of output 23 [2022-03-20 12:59:14,875 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 [2022-03-20 12:59:14,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:14,930 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 [2022-03-20 12:59:14,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:14,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:14,980 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 23 treesize of output 23 [2022-03-20 12:59:14,995 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 [2022-03-20 12:59:15,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:15,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:15,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:15,805 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:59:15,805 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 [2022-03-20 12:59:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 46 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-03-20 12:59:15,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:17,233 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 [2022-03-20 12:59:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-20 12:59:17,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856658658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:17,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:17,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2022-03-20 12:59:17,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [140738698] [2022-03-20 12:59:17,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [140738698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:17,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:17,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 12:59:17,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018881486] [2022-03-20 12:59:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:17,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 12:59:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 12:59:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1397, Unknown=1, NotChecked=76, Total=1640 [2022-03-20 12:59:17,572 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) [2022-03-20 12:59:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:24,687 INFO L93 Difference]: Finished difference Result 5272 states and 6271 transitions. [2022-03-20 12:59:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:59:24,688 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 [2022-03-20 12:59:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:24,692 INFO L225 Difference]: With dead ends: 5272 [2022-03-20 12:59:24,693 INFO L226 Difference]: Without dead ends: 5104 [2022-03-20 12:59:24,693 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 [2022-03-20 12:59:24,694 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 [2022-03-20 12:59:24,694 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] [2022-03-20 12:59:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2022-03-20 12:59:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4970. [2022-03-20 12:59:30,365 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) [2022-03-20 12:59:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-20 12:59:30,369 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-20 12:59:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:30,369 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-20 12:59:30,369 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) [2022-03-20 12:59:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-20 12:59:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:59:30,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:30,373 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] [2022-03-20 12:59:30,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:30,591 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 [2022-03-20 12:59:30,591 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 53 times [2022-03-20 12:59:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:30,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910120437] [2022-03-20 12:59:30,593 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:30,593 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:30,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 54 times [2022-03-20 12:59:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:30,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565287709] [2022-03-20 12:59:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:30,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:31,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 12:59:31,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565287709] [2022-03-20 12:59:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565287709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638798981] [2022-03-20 12:59:31,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:31,184 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) [2022-03-20 12:59:31,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 12:59:32,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 12:59:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:32,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 12:59:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:32,219 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 [2022-03-20 12:59:32,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,301 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 [2022-03-20 12:59:32,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,462 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 [2022-03-20 12:59:32,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:32,566 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 [2022-03-20 12:59:32,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:33,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 12:59:33,064 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 [2022-03-20 12:59:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 32 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 12:59:33,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:33,936 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 [2022-03-20 12:59:34,243 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 [2022-03-20 12:59:34,252 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 [2022-03-20 12:59:34,264 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (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 [2022-03-20 12:59:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 43 proven. 7 refuted. 0 times theorem prover too weak. 236 trivial. 56 not checked. [2022-03-20 12:59:34,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638798981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:34,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:34,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 21] total 50 [2022-03-20 12:59:34,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910120437] [2022-03-20 12:59:34,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910120437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:34,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:34,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:59:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908245614] [2022-03-20 12:59:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:34,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:59:34,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:59:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1799, Unknown=4, NotChecked=364, Total=2450 [2022-03-20 12:59:34,281 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) [2022-03-20 12:59:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:41,355 INFO L93 Difference]: Finished difference Result 5272 states and 6274 transitions. [2022-03-20 12:59:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:59:41,356 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 [2022-03-20 12:59:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:41,361 INFO L225 Difference]: With dead ends: 5272 [2022-03-20 12:59:41,361 INFO L226 Difference]: Without dead ends: 5062 [2022-03-20 12:59:41,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=374, Invalid=3060, Unknown=4, NotChecked=468, Total=3906 [2022-03-20 12:59:41,362 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 [2022-03-20 12:59:41,362 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] [2022-03-20 12:59:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2022-03-20 12:59:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4970. [2022-03-20 12:59:46,984 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) [2022-03-20 12:59:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-20 12:59:46,989 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-20 12:59:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:46,990 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-20 12:59:46,990 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) [2022-03-20 12:59:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-20 12:59:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 12:59:46,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:46,994 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] [2022-03-20 12:59:47,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 12:59:47,194 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 [2022-03-20 12:59:47,194 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 55 times [2022-03-20 12:59:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:47,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1631095192] [2022-03-20 12:59:47,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:47,196 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:47,196 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 56 times [2022-03-20 12:59:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899952890] [2022-03-20 12:59:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 12:59:47,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899952890] [2022-03-20 12:59:47,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899952890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:47,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607968031] [2022-03-20 12:59:47,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:47,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:47,721 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) [2022-03-20 12:59:47,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 12:59:48,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:48,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 12:59:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:48,050 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 [2022-03-20 12:59:48,080 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 [2022-03-20 12:59:48,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:48,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:48,150 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 [2022-03-20 12:59:48,168 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 [2022-03-20 12:59:48,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:48,202 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 [2022-03-20 12:59:48,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:48,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:48,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:48,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 12:59:49,009 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 12:59:49,010 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 [2022-03-20 12:59:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 12:59:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:01,633 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 [2022-03-20 13:00:01,746 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 [2022-03-20 13:00:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 253 trivial. 10 not checked. [2022-03-20 13:00:01,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607968031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:01,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:01,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 47 [2022-03-20 13:00:01,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1631095192] [2022-03-20 13:00:01,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1631095192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:01,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:01,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:00:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077638629] [2022-03-20 13:00:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:01,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:00:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:00:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1686, Unknown=12, NotChecked=174, Total=2162 [2022-03-20 13:00:01,762 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) [2022-03-20 13:00:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:08,725 INFO L93 Difference]: Finished difference Result 5200 states and 6188 transitions. [2022-03-20 13:00:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:00:08,726 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 [2022-03-20 13:00:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:08,730 INFO L225 Difference]: With dead ends: 5200 [2022-03-20 13:00:08,731 INFO L226 Difference]: Without dead ends: 5005 [2022-03-20 13:00:08,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=395, Invalid=3023, Unknown=12, NotChecked=230, Total=3660 [2022-03-20 13:00:08,732 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 [2022-03-20 13:00:08,732 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] [2022-03-20 13:00:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2022-03-20 13:00:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 4970. [2022-03-20 13:00:14,585 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) [2022-03-20 13:00:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-20 13:00:14,590 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-20 13:00:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:14,590 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-20 13:00:14,590 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) [2022-03-20 13:00:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-20 13:00:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 13:00:14,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:14,594 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] [2022-03-20 13:00:14,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:14,795 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 [2022-03-20 13:00:14,795 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 57 times [2022-03-20 13:00:14,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:14,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762139778] [2022-03-20 13:00:14,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:14,796 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:14,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 58 times [2022-03-20 13:00:14,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:14,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399400617] [2022-03-20 13:00:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:14,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 13:00:15,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:15,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399400617] [2022-03-20 13:00:15,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399400617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:15,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18977945] [2022-03-20 13:00:15,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:15,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:15,489 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) [2022-03-20 13:00:15,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 13:00:15,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:15,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 13:00:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:15,856 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 [2022-03-20 13:00:15,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:15,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:15,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,115 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 [2022-03-20 13:00:16,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-20 13:00:16,879 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-20 13:00:16,880 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 [2022-03-20 13:00:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 62 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-03-20 13:00:17,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:18,542 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 [2022-03-20 13:00:18,785 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 [2022-03-20 13:00:18,805 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 [2022-03-20 13:00:18,829 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)) (not (< (mod c_main_~i~0 4294967296) 10))) is different from false [2022-03-20 13:00:18,965 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)))) (<= 10 (mod c_main_~i~0 4294967296)) (<= 10 (mod (+ c_main_~i~0 2) 4294967296))) is different from false [2022-03-20 13:00:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 217 trivial. 44 not checked. [2022-03-20 13:00:18,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18977945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:18,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:18,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 20] total 45 [2022-03-20 13:00:18,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762139778] [2022-03-20 13:00:18,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762139778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:18,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:18,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:00:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892103002] [2022-03-20 13:00:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:18,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:00:18,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:18,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:00:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1380, Unknown=7, NotChecked=400, Total=1980 [2022-03-20 13:00:18,985 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) [2022-03-20 13:00:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:26,263 INFO L93 Difference]: Finished difference Result 8289 states and 9840 transitions. [2022-03-20 13:00:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:00:26,264 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 [2022-03-20 13:00:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:26,269 INFO L225 Difference]: With dead ends: 8289 [2022-03-20 13:00:26,270 INFO L226 Difference]: Without dead ends: 5264 [2022-03-20 13:00:26,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=263, Invalid=2300, Unknown=7, NotChecked=510, Total=3080 [2022-03-20 13:00:26,274 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 [2022-03-20 13:00:26,274 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] [2022-03-20 13:00:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states.