/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-5d317bd [2022-03-19 02:20:59,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:20:59,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:20:59,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 02:20:59,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 02:20:59,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 02:20:59,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 02:20:59,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 02:20:59,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:20:59,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:20:59,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:20:59,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:20:59,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:20:59,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:20:59,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:20:59,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:20:59,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:20:59,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:20:59,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:20:59,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:20:59,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:20:59,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:20:59,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:20:59,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:20:59,104 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:20:59,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:20:59,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:20:59,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:20:59,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:20:59,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:20:59,334 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:20:59,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-03-19 02:20:59,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686386cce/f4483178b5c64c41b7fce3a3d524ffd3/FLAG3f7da3736 [2022-03-19 02:20:59,746 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:20:59,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-03-19 02:20:59,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686386cce/f4483178b5c64c41b7fce3a3d524ffd3/FLAG3f7da3736 [2022-03-19 02:20:59,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686386cce/f4483178b5c64c41b7fce3a3d524ffd3 [2022-03-19 02:20:59,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:20:59,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:20:59,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:20:59,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:20:59,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:20:59,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:20:59" (1/1) ... [2022-03-19 02:20:59,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5367977a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:59, skipping insertion in model container [2022-03-19 02:20:59,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:20:59" (1/1) ... [2022-03-19 02:20:59,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:20:59,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:20:59,964 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] [2022-03-19 02:20:59,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:21:00,001 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:21:00,011 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] [2022-03-19 02:21:00,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:21:00,041 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:21:00,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00 WrapperNode [2022-03-19 02:21:00,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:21:00,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:21:00,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:21:00,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:21:00,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:21:00,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:21:00,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:21:00,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:21:00,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (1/1) ... [2022-03-19 02:21:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:21:00,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:00,145 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) [2022-03-19 02:21:00,150 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 [2022-03-19 02:21:00,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:21:00,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:21:00,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:21:00,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:21:00,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:21:00,168 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:21:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:21:00,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:21:00,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:21:00,216 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:21:00,217 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:21:00,337 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:21:00,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:21:00,342 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-19 02:21:00,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:21:00 BoogieIcfgContainer [2022-03-19 02:21:00,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:21:00,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:21:00,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:21:00,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:21:00,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:20:59" (1/3) ... [2022-03-19 02:21:00,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7151abf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:21:00, skipping insertion in model container [2022-03-19 02:21:00,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:21:00" (2/3) ... [2022-03-19 02:21:00,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7151abf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:21:00, skipping insertion in model container [2022-03-19 02:21:00,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:21:00" (3/3) ... [2022-03-19 02:21:00,350 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-03-19 02:21:00,354 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:21:00,354 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:21:00,381 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:21:00,385 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 [2022-03-19 02:21:00,385 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:21:00,399 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) [2022-03-19 02:21:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 02:21:00,405 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:00,405 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:00,405 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:00,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-03-19 02:21:00,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:00,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450723194] [2022-03-19 02:21:00,421 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:21:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 2 times [2022-03-19 02:21:00,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:00,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334386883] [2022-03-19 02:21:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:21:00,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:00,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334386883] [2022-03-19 02:21:00,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334386883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:00,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:00,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:21:00,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450723194] [2022-03-19 02:21:00,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450723194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:00,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:00,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:21:00,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27651888] [2022-03-19 02:21:00,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:00,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 02:21:00,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:00,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 02:21:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:21:00,623 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) [2022-03-19 02:21:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:00,687 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-03-19 02:21:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 02:21:00,692 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 [2022-03-19 02:21:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:00,696 INFO L225 Difference]: With dead ends: 64 [2022-03-19 02:21:00,696 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 02:21:00,698 INFO L911 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 [2022-03-19 02:21:00,700 INFO L912 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 [2022-03-19 02:21:00,701 INFO L913 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] [2022-03-19 02:21:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 02:21:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 02:21:00,739 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) [2022-03-19 02:21:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-19 02:21:00,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-03-19 02:21:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:00,742 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-19 02:21:00,742 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) [2022-03-19 02:21:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-19 02:21:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 02:21:00,744 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:00,744 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:00,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:21:00,745 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-03-19 02:21:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:00,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323737887] [2022-03-19 02:21:00,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:21:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 2 times [2022-03-19 02:21:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:00,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897864919] [2022-03-19 02:21:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:21:00,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:00,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897864919] [2022-03-19 02:21:00,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897864919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:00,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:00,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:21:00,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323737887] [2022-03-19 02:21:00,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323737887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:00,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:00,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:21:00,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345295013] [2022-03-19 02:21:00,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:00,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:21:00,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:21:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 02:21:00,891 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) [2022-03-19 02:21:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:00,992 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-03-19 02:21:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:21:00,992 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 [2022-03-19 02:21:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:00,998 INFO L225 Difference]: With dead ends: 65 [2022-03-19 02:21:00,998 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 02:21:01,002 INFO L911 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 [2022-03-19 02:21:01,004 INFO L912 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 [2022-03-19 02:21:01,005 INFO L913 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] [2022-03-19 02:21:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 02:21:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-03-19 02:21:01,015 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) [2022-03-19 02:21:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-19 02:21:01,017 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-03-19 02:21:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:01,017 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-19 02:21:01,017 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) [2022-03-19 02:21:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-19 02:21:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 02:21:01,019 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:01,019 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:01,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:21:01,019 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-03-19 02:21:01,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:01,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279750524] [2022-03-19 02:21:01,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:01,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:01,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 2 times [2022-03-19 02:21:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:01,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950238219] [2022-03-19 02:21:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:01,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:21:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950238219] [2022-03-19 02:21:01,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950238219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:01,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123364735] [2022-03-19 02:21:01,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:01,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:01,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:01,177 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) [2022-03-19 02:21:01,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 02:21:01,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 02:21:01,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:21:01,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:21:01,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:21:01,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123364735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:01,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:21:01,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-19 02:21:01,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:01,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279750524] [2022-03-19 02:21:01,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279750524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:01,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:01,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:21:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677779020] [2022-03-19 02:21:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:01,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:21:01,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:21:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 02:21:01,363 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) [2022-03-19 02:21:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:01,387 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-19 02:21:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:21:01,387 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 [2022-03-19 02:21:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:01,388 INFO L225 Difference]: With dead ends: 54 [2022-03-19 02:21:01,388 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 02:21:01,389 INFO L911 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 [2022-03-19 02:21:01,389 INFO L912 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 [2022-03-19 02:21:01,390 INFO L913 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] [2022-03-19 02:21:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 02:21:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-03-19 02:21:01,395 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) [2022-03-19 02:21:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-03-19 02:21:01,396 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-03-19 02:21:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:01,396 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-03-19 02:21:01,396 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) [2022-03-19 02:21:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-03-19 02:21:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 02:21:01,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:01,397 INFO L500 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] [2022-03-19 02:21:01,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:01,614 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 [2022-03-19 02:21:01,614 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2022-03-19 02:21:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141820443] [2022-03-19 02:21:01,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:01,617 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:01,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:01,617 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 2 times [2022-03-19 02:21:01,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:01,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921159166] [2022-03-19 02:21:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:01,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:01,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 02:21:01,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921159166] [2022-03-19 02:21:01,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921159166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035338376] [2022-03-19 02:21:01,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:01,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:01,730 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) [2022-03-19 02:21:01,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 02:21:01,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:01,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:21:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 02:21:01,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:21:01,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035338376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:01,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:21:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-19 02:21:01,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141820443] [2022-03-19 02:21:01,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141820443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:01,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:21:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305991057] [2022-03-19 02:21:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:01,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:21:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:21:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:21:01,839 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) [2022-03-19 02:21:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:01,870 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-03-19 02:21:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:21:01,871 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 [2022-03-19 02:21:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:01,872 INFO L225 Difference]: With dead ends: 99 [2022-03-19 02:21:01,872 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 02:21:01,872 INFO L911 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 [2022-03-19 02:21:01,873 INFO L912 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 [2022-03-19 02:21:01,873 INFO L913 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] [2022-03-19 02:21:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 02:21:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-03-19 02:21:01,878 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) [2022-03-19 02:21:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-03-19 02:21:01,879 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-03-19 02:21:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:01,879 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-03-19 02:21:01,880 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) [2022-03-19 02:21:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-03-19 02:21:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 02:21:01,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:01,880 INFO L500 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] [2022-03-19 02:21:01,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:02,097 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 [2022-03-19 02:21:02,097 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2022-03-19 02:21:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:02,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297687655] [2022-03-19 02:21:02,099 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:02,099 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:02,100 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 2 times [2022-03-19 02:21:02,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:02,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691560053] [2022-03-19 02:21:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:02,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:21:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691560053] [2022-03-19 02:21:02,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691560053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362079348] [2022-03-19 02:21:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:02,208 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) [2022-03-19 02:21:02,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 02:21:02,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:21:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:02,568 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:02,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2022-03-19 02:21:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 02:21:02,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362079348] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:02,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 02:21:02,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 17 [2022-03-19 02:21:02,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297687655] [2022-03-19 02:21:02,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297687655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:02,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:02,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:21:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181475088] [2022-03-19 02:21:02,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:02,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:21:02,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:21:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-19 02:21:02,611 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) [2022-03-19 02:21:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:02,711 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-19 02:21:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:21:02,711 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 [2022-03-19 02:21:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:02,714 INFO L225 Difference]: With dead ends: 66 [2022-03-19 02:21:02,714 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 02:21:02,714 INFO L911 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 [2022-03-19 02:21:02,716 INFO L912 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 [2022-03-19 02:21:02,717 INFO L913 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] [2022-03-19 02:21:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 02:21:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 02:21:02,726 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) [2022-03-19 02:21:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-19 02:21:02,727 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-03-19 02:21:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:02,728 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-19 02:21:02,728 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) [2022-03-19 02:21:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-19 02:21:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 02:21:02,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:02,729 INFO L500 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] [2022-03-19 02:21:02,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:02,943 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 [2022-03-19 02:21:02,943 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2022-03-19 02:21:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070174447] [2022-03-19 02:21:02,945 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:02,945 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:02,945 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 2 times [2022-03-19 02:21:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411640697] [2022-03-19 02:21:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:03,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:03,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411640697] [2022-03-19 02:21:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411640697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566793580] [2022-03-19 02:21:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:03,036 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) [2022-03-19 02:21:03,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 02:21:03,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:03,208 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 [2022-03-19 02:21:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 02:21:03,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:03,328 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:03,328 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 [2022-03-19 02:21:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:21:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566793580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:03,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-03-19 02:21:03,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070174447] [2022-03-19 02:21:03,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070174447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:03,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:03,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:21:03,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550183653] [2022-03-19 02:21:03,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:03,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:21:03,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:21:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:21:03,370 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) [2022-03-19 02:21:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:03,471 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-03-19 02:21:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:21:03,472 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 [2022-03-19 02:21:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:03,473 INFO L225 Difference]: With dead ends: 130 [2022-03-19 02:21:03,473 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 02:21:03,473 INFO L911 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 [2022-03-19 02:21:03,475 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:03,475 INFO L913 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] [2022-03-19 02:21:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 02:21:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-03-19 02:21:03,492 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) [2022-03-19 02:21:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-03-19 02:21:03,493 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-03-19 02:21:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:03,493 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-03-19 02:21:03,493 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) [2022-03-19 02:21:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-03-19 02:21:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 02:21:03,498 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:03,498 INFO L500 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] [2022-03-19 02:21:03,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:03,715 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 [2022-03-19 02:21:03,715 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 3 times [2022-03-19 02:21:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11089500] [2022-03-19 02:21:03,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:03,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:03,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:03,717 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 4 times [2022-03-19 02:21:03,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:03,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944175442] [2022-03-19 02:21:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:03,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:03,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944175442] [2022-03-19 02:21:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944175442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922217348] [2022-03-19 02:21:03,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:03,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:03,795 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) [2022-03-19 02:21:03,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 02:21:03,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:03,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:03,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:03,993 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 [2022-03-19 02:21:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 02:21:04,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:04,156 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:04,157 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 [2022-03-19 02:21:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 02:21:04,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922217348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:04,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:04,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2022-03-19 02:21:04,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:04,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11089500] [2022-03-19 02:21:04,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11089500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:04,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:04,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:21:04,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432140980] [2022-03-19 02:21:04,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:04,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:21:04,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:04,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:21:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:21:04,210 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) [2022-03-19 02:21:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:04,353 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2022-03-19 02:21:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:21:04,353 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 [2022-03-19 02:21:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:04,355 INFO L225 Difference]: With dead ends: 157 [2022-03-19 02:21:04,355 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 02:21:04,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:21:04,356 INFO L912 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 [2022-03-19 02:21:04,356 INFO L913 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] [2022-03-19 02:21:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 02:21:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 48. [2022-03-19 02:21:04,363 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) [2022-03-19 02:21:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-19 02:21:04,364 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 31 [2022-03-19 02:21:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:04,364 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-19 02:21:04,364 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) [2022-03-19 02:21:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-19 02:21:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 02:21:04,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:04,365 INFO L500 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] [2022-03-19 02:21:04,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:04,579 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 [2022-03-19 02:21:04,579 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 5 times [2022-03-19 02:21:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:04,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776720895] [2022-03-19 02:21:04,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:04,582 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:04,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 6 times [2022-03-19 02:21:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:04,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83211913] [2022-03-19 02:21:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:04,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83211913] [2022-03-19 02:21:04,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83211913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083866031] [2022-03-19 02:21:04,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:04,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:04,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:04,644 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) [2022-03-19 02:21:04,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 02:21:04,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:04,838 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 [2022-03-19 02:21:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 02:21:04,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:04,954 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:04,954 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 [2022-03-19 02:21:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 02:21:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083866031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:04,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-03-19 02:21:04,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:04,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776720895] [2022-03-19 02:21:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776720895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:04,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:21:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633354544] [2022-03-19 02:21:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:04,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:21:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:21:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:21:04,990 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) [2022-03-19 02:21:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:05,191 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2022-03-19 02:21:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:21:05,192 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 [2022-03-19 02:21:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:05,193 INFO L225 Difference]: With dead ends: 184 [2022-03-19 02:21:05,193 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 02:21:05,193 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:21:05,194 INFO L912 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 [2022-03-19 02:21:05,194 INFO L913 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] [2022-03-19 02:21:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 02:21:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 50. [2022-03-19 02:21:05,202 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) [2022-03-19 02:21:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-19 02:21:05,202 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 33 [2022-03-19 02:21:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:05,202 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-19 02:21:05,202 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) [2022-03-19 02:21:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-19 02:21:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 02:21:05,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:05,203 INFO L500 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] [2022-03-19 02:21:05,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:05,420 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 [2022-03-19 02:21:05,420 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 7 times [2022-03-19 02:21:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:05,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1899925449] [2022-03-19 02:21:05,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:05,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:05,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 8 times [2022-03-19 02:21:05,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:05,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426961397] [2022-03-19 02:21:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:05,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426961397] [2022-03-19 02:21:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426961397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106373455] [2022-03-19 02:21:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:05,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:05,539 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) [2022-03-19 02:21:05,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 02:21:05,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:05,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:05,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:05,749 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 [2022-03-19 02:21:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 02:21:05,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:05,858 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:05,858 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 [2022-03-19 02:21:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 02:21:05,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106373455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:05,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:05,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-03-19 02:21:05,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:05,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1899925449] [2022-03-19 02:21:05,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1899925449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:05,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:05,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:21:05,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720354748] [2022-03-19 02:21:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:05,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:21:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:21:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:21:05,913 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) [2022-03-19 02:21:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:06,193 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-03-19 02:21:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:21:06,193 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 [2022-03-19 02:21:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:06,194 INFO L225 Difference]: With dead ends: 211 [2022-03-19 02:21:06,194 INFO L226 Difference]: Without dead ends: 176 [2022-03-19 02:21:06,195 INFO L911 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 [2022-03-19 02:21:06,195 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 255 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-19 02:21:06,195 INFO L913 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] [2022-03-19 02:21:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-19 02:21:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 52. [2022-03-19 02:21:06,204 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) [2022-03-19 02:21:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-19 02:21:06,205 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 35 [2022-03-19 02:21:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:06,205 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-19 02:21:06,205 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) [2022-03-19 02:21:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-19 02:21:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 02:21:06,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:06,206 INFO L500 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] [2022-03-19 02:21:06,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:06,423 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 [2022-03-19 02:21:06,423 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 9 times [2022-03-19 02:21:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:06,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794543528] [2022-03-19 02:21:06,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:06,425 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:06,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 10 times [2022-03-19 02:21:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837785380] [2022-03-19 02:21:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:06,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:06,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:06,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837785380] [2022-03-19 02:21:06,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837785380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:06,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724997344] [2022-03-19 02:21:06,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:06,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:06,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:06,512 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) [2022-03-19 02:21:06,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 02:21:06,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:06,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:06,714 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 [2022-03-19 02:21:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 02:21:06,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:06,848 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:06,848 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 [2022-03-19 02:21:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 02:21:06,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724997344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:06,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:06,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-03-19 02:21:06,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:06,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794543528] [2022-03-19 02:21:06,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794543528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:06,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:06,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:21:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093138505] [2022-03-19 02:21:06,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:06,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:21:06,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:21:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:21:06,997 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) [2022-03-19 02:21:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:07,277 INFO L93 Difference]: Finished difference Result 238 states and 327 transitions. [2022-03-19 02:21:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:21:07,277 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 [2022-03-19 02:21:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:07,278 INFO L225 Difference]: With dead ends: 238 [2022-03-19 02:21:07,278 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 02:21:07,279 INFO L911 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 [2022-03-19 02:21:07,279 INFO L912 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:07,279 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 102 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:21:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 02:21:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 54. [2022-03-19 02:21:07,324 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) [2022-03-19 02:21:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-03-19 02:21:07,324 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2022-03-19 02:21:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:07,325 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-03-19 02:21:07,325 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) [2022-03-19 02:21:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-03-19 02:21:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 02:21:07,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:07,325 INFO L500 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] [2022-03-19 02:21:07,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:07,542 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 [2022-03-19 02:21:07,543 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 11 times [2022-03-19 02:21:07,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:07,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217451749] [2022-03-19 02:21:07,545 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:07,545 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:07,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 12 times [2022-03-19 02:21:07,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:07,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077172070] [2022-03-19 02:21:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:07,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077172070] [2022-03-19 02:21:07,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077172070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958435925] [2022-03-19 02:21:07,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:07,622 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) [2022-03-19 02:21:07,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 02:21:07,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:07,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:07,897 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 [2022-03-19 02:21:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 02:21:07,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:07,980 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:07,981 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 [2022-03-19 02:21:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 02:21:08,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958435925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:08,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:08,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-03-19 02:21:08,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:08,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217451749] [2022-03-19 02:21:08,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217451749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:08,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:08,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:21:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619837046] [2022-03-19 02:21:08,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:08,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:21:08,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:21:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:21:08,009 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) [2022-03-19 02:21:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:08,338 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-03-19 02:21:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:21:08,338 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 [2022-03-19 02:21:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:08,339 INFO L225 Difference]: With dead ends: 265 [2022-03-19 02:21:08,339 INFO L226 Difference]: Without dead ends: 230 [2022-03-19 02:21:08,339 INFO L911 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 [2022-03-19 02:21:08,340 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 336 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:08,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 99 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:21:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-19 02:21:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 56. [2022-03-19 02:21:08,350 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) [2022-03-19 02:21:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-19 02:21:08,350 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-03-19 02:21:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:08,350 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-19 02:21:08,350 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) [2022-03-19 02:21:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-19 02:21:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 02:21:08,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:08,351 INFO L500 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] [2022-03-19 02:21:08,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:08,566 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 [2022-03-19 02:21:08,567 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 13 times [2022-03-19 02:21:08,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:08,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713308222] [2022-03-19 02:21:08,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:08,568 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:08,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 14 times [2022-03-19 02:21:08,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383677350] [2022-03-19 02:21:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:08,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383677350] [2022-03-19 02:21:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383677350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702755905] [2022-03-19 02:21:08,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:08,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:08,712 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) [2022-03-19 02:21:08,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 02:21:08,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:08,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:08,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:09,053 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 [2022-03-19 02:21:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-19 02:21:09,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:09,257 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:09,257 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 [2022-03-19 02:21:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-19 02:21:09,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702755905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:09,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:09,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 23 [2022-03-19 02:21:09,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713308222] [2022-03-19 02:21:09,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713308222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:09,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:09,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:21:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315573405] [2022-03-19 02:21:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:09,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:21:09,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:21:09,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:21:09,313 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) [2022-03-19 02:21:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:09,927 INFO L93 Difference]: Finished difference Result 292 states and 403 transitions. [2022-03-19 02:21:09,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:21:09,927 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 [2022-03-19 02:21:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:09,928 INFO L225 Difference]: With dead ends: 292 [2022-03-19 02:21:09,928 INFO L226 Difference]: Without dead ends: 257 [2022-03-19 02:21:09,929 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:21:09,929 INFO L912 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:09,929 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:21:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-19 02:21:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 58. [2022-03-19 02:21:09,953 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) [2022-03-19 02:21:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-03-19 02:21:09,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 41 [2022-03-19 02:21:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:09,954 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-03-19 02:21:09,954 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) [2022-03-19 02:21:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-03-19 02:21:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 02:21:09,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:09,955 INFO L500 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] [2022-03-19 02:21:09,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:10,155 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 [2022-03-19 02:21:10,155 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 15 times [2022-03-19 02:21:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:10,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [502741031] [2022-03-19 02:21:10,157 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:10,157 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:10,157 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 16 times [2022-03-19 02:21:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:10,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603242002] [2022-03-19 02:21:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:10,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:10,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:10,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:10,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603242002] [2022-03-19 02:21:10,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603242002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584869421] [2022-03-19 02:21:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:10,287 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) [2022-03-19 02:21:10,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 02:21:10,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:10,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:10,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:10,497 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 [2022-03-19 02:21:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-03-19 02:21:10,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:10,677 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:10,677 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 [2022-03-19 02:21:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-03-19 02:21:10,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584869421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:10,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:10,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2022-03-19 02:21:10,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:10,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [502741031] [2022-03-19 02:21:10,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [502741031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:10,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:10,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:21:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439692058] [2022-03-19 02:21:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:10,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:21:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:21:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:21:10,715 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) [2022-03-19 02:21:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:11,482 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2022-03-19 02:21:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:21:11,483 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 [2022-03-19 02:21:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:11,484 INFO L225 Difference]: With dead ends: 319 [2022-03-19 02:21:11,484 INFO L226 Difference]: Without dead ends: 284 [2022-03-19 02:21:11,486 INFO L911 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 [2022-03-19 02:21:11,486 INFO L912 BasicCegarLoop]: 111 mSDtfsCounter, 432 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:11,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 123 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:21:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-19 02:21:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 60. [2022-03-19 02:21:11,504 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) [2022-03-19 02:21:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-19 02:21:11,505 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 43 [2022-03-19 02:21:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:11,505 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-19 02:21:11,505 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) [2022-03-19 02:21:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-19 02:21:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 02:21:11,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:11,506 INFO L500 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] [2022-03-19 02:21:11,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:11,723 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 [2022-03-19 02:21:11,723 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 17 times [2022-03-19 02:21:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:11,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024563914] [2022-03-19 02:21:11,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:11,725 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:11,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 18 times [2022-03-19 02:21:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385064520] [2022-03-19 02:21:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:11,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:21:11,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:11,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385064520] [2022-03-19 02:21:11,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385064520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:11,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710917176] [2022-03-19 02:21:11,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:11,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:11,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:11,860 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) [2022-03-19 02:21:11,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 02:21:11,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:11,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:12,120 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 [2022-03-19 02:21:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 02:21:12,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:12,308 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:12,309 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 [2022-03-19 02:21:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 02:21:12,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710917176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:12,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:12,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 24 [2022-03-19 02:21:12,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024563914] [2022-03-19 02:21:12,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024563914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:12,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:12,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:21:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883009213] [2022-03-19 02:21:12,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:12,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:21:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:21:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:21:12,378 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) [2022-03-19 02:21:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:13,342 INFO L93 Difference]: Finished difference Result 346 states and 479 transitions. [2022-03-19 02:21:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:21:13,343 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 [2022-03-19 02:21:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:13,344 INFO L225 Difference]: With dead ends: 346 [2022-03-19 02:21:13,344 INFO L226 Difference]: Without dead ends: 311 [2022-03-19 02:21:13,345 INFO L911 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 [2022-03-19 02:21:13,345 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 495 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-03-19 02:21:13,345 INFO L913 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] [2022-03-19 02:21:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-19 02:21:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 62. [2022-03-19 02:21:13,361 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) [2022-03-19 02:21:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-03-19 02:21:13,361 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 45 [2022-03-19 02:21:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:13,361 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-03-19 02:21:13,362 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) [2022-03-19 02:21:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-03-19 02:21:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 02:21:13,362 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:13,362 INFO L500 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] [2022-03-19 02:21:13,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:13,571 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 [2022-03-19 02:21:13,574 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 19 times [2022-03-19 02:21:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950390925] [2022-03-19 02:21:13,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:13,576 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:13,576 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 20 times [2022-03-19 02:21:13,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399037345] [2022-03-19 02:21:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:13,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:13,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:13,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399037345] [2022-03-19 02:21:13,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399037345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042467348] [2022-03-19 02:21:13,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:13,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:13,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:13,677 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) [2022-03-19 02:21:13,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 02:21:13,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:21:13,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:13,925 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 [2022-03-19 02:21:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 02:21:13,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:14,035 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:14,036 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 [2022-03-19 02:21:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-03-19 02:21:14,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042467348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:14,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:14,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 8] total 18 [2022-03-19 02:21:14,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:14,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950390925] [2022-03-19 02:21:14,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950390925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:14,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:14,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:21:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937565531] [2022-03-19 02:21:14,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:14,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:21:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:21:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:21:14,074 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) [2022-03-19 02:21:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:14,168 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-19 02:21:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:21:14,168 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 [2022-03-19 02:21:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:14,169 INFO L225 Difference]: With dead ends: 115 [2022-03-19 02:21:14,169 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 02:21:14,169 INFO L911 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 [2022-03-19 02:21:14,170 INFO L912 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:14,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:21:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 02:21:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-03-19 02:21:14,192 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) [2022-03-19 02:21:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-03-19 02:21:14,192 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2022-03-19 02:21:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:14,192 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-03-19 02:21:14,192 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) [2022-03-19 02:21:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-03-19 02:21:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 02:21:14,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:14,193 INFO L500 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] [2022-03-19 02:21:14,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 02:21:14,400 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 [2022-03-19 02:21:14,401 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 21 times [2022-03-19 02:21:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390169343] [2022-03-19 02:21:14,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:14,404 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:14,404 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 22 times [2022-03-19 02:21:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733281804] [2022-03-19 02:21:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:14,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:14,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733281804] [2022-03-19 02:21:14,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733281804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539643308] [2022-03-19 02:21:14,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:14,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:14,468 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) [2022-03-19 02:21:14,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 02:21:14,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 02:21:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:14,760 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 [2022-03-19 02:21:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-19 02:21:14,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:14,999 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:14,999 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 [2022-03-19 02:21:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 02:21:15,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539643308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:15,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:15,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 12] total 26 [2022-03-19 02:21:15,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:15,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390169343] [2022-03-19 02:21:15,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390169343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:15,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:15,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:21:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033271127] [2022-03-19 02:21:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:15,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:21:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:21:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:21:15,042 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) [2022-03-19 02:21:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:15,183 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-03-19 02:21:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:21:15,184 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 [2022-03-19 02:21:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:15,184 INFO L225 Difference]: With dead ends: 143 [2022-03-19 02:21:15,184 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 02:21:15,185 INFO L911 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 [2022-03-19 02:21:15,185 INFO L912 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 [2022-03-19 02:21:15,185 INFO L913 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] [2022-03-19 02:21:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 02:21:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-19 02:21:15,222 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) [2022-03-19 02:21:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-03-19 02:21:15,223 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-03-19 02:21:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:15,223 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-03-19 02:21:15,223 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) [2022-03-19 02:21:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-03-19 02:21:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 02:21:15,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:15,224 INFO L500 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] [2022-03-19 02:21:15,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 02:21:15,440 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 [2022-03-19 02:21:15,441 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 23 times [2022-03-19 02:21:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:15,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299062220] [2022-03-19 02:21:15,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:15,442 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:15,442 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 24 times [2022-03-19 02:21:15,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:15,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415777855] [2022-03-19 02:21:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:15,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:15,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:15,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:15,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415777855] [2022-03-19 02:21:15,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415777855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:15,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078690817] [2022-03-19 02:21:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:15,513 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) [2022-03-19 02:21:15,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 02:21:15,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:15,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:15,770 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 [2022-03-19 02:21:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-19 02:21:15,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:15,897 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:15,897 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 [2022-03-19 02:21:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-19 02:21:15,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078690817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:15,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:15,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2022-03-19 02:21:15,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:15,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299062220] [2022-03-19 02:21:15,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299062220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:15,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:15,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:21:15,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366079966] [2022-03-19 02:21:15,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:15,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:21:15,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:21:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:21:15,959 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) [2022-03-19 02:21:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:16,202 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2022-03-19 02:21:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:21:16,202 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 [2022-03-19 02:21:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:16,204 INFO L225 Difference]: With dead ends: 167 [2022-03-19 02:21:16,204 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 02:21:16,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:21:16,205 INFO L912 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 [2022-03-19 02:21:16,205 INFO L913 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] [2022-03-19 02:21:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 02:21:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-03-19 02:21:16,275 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) [2022-03-19 02:21:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-19 02:21:16,275 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 53 [2022-03-19 02:21:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:16,276 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-19 02:21:16,276 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) [2022-03-19 02:21:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-19 02:21:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 02:21:16,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:16,277 INFO L500 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] [2022-03-19 02:21:16,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:16,477 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 [2022-03-19 02:21:16,477 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 25 times [2022-03-19 02:21:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:16,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1924955192] [2022-03-19 02:21:16,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:16,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:16,479 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 26 times [2022-03-19 02:21:16,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190854218] [2022-03-19 02:21:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:16,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:16,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190854218] [2022-03-19 02:21:16,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190854218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:16,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132405918] [2022-03-19 02:21:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:16,550 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) [2022-03-19 02:21:16,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 02:21:16,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:16,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:16,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 02:21:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:16,984 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 [2022-03-19 02:21:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-19 02:21:17,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:17,346 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:17,346 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 [2022-03-19 02:21:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 02:21:17,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132405918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:17,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:17,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 28 [2022-03-19 02:21:17,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1924955192] [2022-03-19 02:21:17,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1924955192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:17,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:17,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:21:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108739078] [2022-03-19 02:21:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:17,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:21:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:21:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:21:17,397 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) [2022-03-19 02:21:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:17,617 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-03-19 02:21:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:21:17,617 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 [2022-03-19 02:21:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:17,618 INFO L225 Difference]: With dead ends: 191 [2022-03-19 02:21:17,618 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 02:21:17,618 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 02:21:17,619 INFO L912 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 [2022-03-19 02:21:17,619 INFO L913 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] [2022-03-19 02:21:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 02:21:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-03-19 02:21:17,661 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) [2022-03-19 02:21:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-03-19 02:21:17,662 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 56 [2022-03-19 02:21:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:17,662 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-03-19 02:21:17,662 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) [2022-03-19 02:21:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-03-19 02:21:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 02:21:17,662 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:17,663 INFO L500 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] [2022-03-19 02:21:17,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:17,879 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 [2022-03-19 02:21:17,880 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:17,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 27 times [2022-03-19 02:21:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:17,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501349308] [2022-03-19 02:21:17,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:17,882 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:17,882 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 28 times [2022-03-19 02:21:17,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:17,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649320177] [2022-03-19 02:21:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:17,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649320177] [2022-03-19 02:21:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649320177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788101544] [2022-03-19 02:21:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:17,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:17,964 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) [2022-03-19 02:21:17,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 02:21:18,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:18,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:18,268 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 [2022-03-19 02:21:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-19 02:21:18,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:18,410 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:18,410 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 [2022-03-19 02:21:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-19 02:21:18,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788101544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:18,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:18,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-03-19 02:21:18,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:18,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501349308] [2022-03-19 02:21:18,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501349308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:18,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:18,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:21:18,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144341217] [2022-03-19 02:21:18,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:18,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:21:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:21:18,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:21:18,459 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) [2022-03-19 02:21:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:18,723 INFO L93 Difference]: Finished difference Result 215 states and 281 transitions. [2022-03-19 02:21:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:21:18,723 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 [2022-03-19 02:21:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:18,724 INFO L225 Difference]: With dead ends: 215 [2022-03-19 02:21:18,724 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 02:21:18,724 INFO L911 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 [2022-03-19 02:21:18,725 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:18,725 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 75 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:21:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 02:21:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-03-19 02:21:18,778 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) [2022-03-19 02:21:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-03-19 02:21:18,779 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 59 [2022-03-19 02:21:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:18,779 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-03-19 02:21:18,779 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) [2022-03-19 02:21:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-03-19 02:21:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 02:21:18,780 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:18,780 INFO L500 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] [2022-03-19 02:21:18,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:18,994 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 [2022-03-19 02:21:18,995 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 29 times [2022-03-19 02:21:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504305303] [2022-03-19 02:21:18,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:18,996 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:18,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 30 times [2022-03-19 02:21:18,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:18,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964175334] [2022-03-19 02:21:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:18,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:19,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:19,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964175334] [2022-03-19 02:21:19,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964175334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:19,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100831090] [2022-03-19 02:21:19,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:19,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:19,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:19,100 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) [2022-03-19 02:21:19,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 02:21:19,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:19,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:19,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 02:21:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:19,320 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 [2022-03-19 02:21:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-19 02:21:19,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:19,423 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:19,423 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 [2022-03-19 02:21:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-19 02:21:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100831090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:19,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-03-19 02:21:19,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504305303] [2022-03-19 02:21:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504305303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:19,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:21:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007341126] [2022-03-19 02:21:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:19,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:21:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:19,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:21:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:21:19,457 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) [2022-03-19 02:21:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:19,713 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2022-03-19 02:21:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:21:19,717 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 [2022-03-19 02:21:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:19,718 INFO L225 Difference]: With dead ends: 239 [2022-03-19 02:21:19,718 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 02:21:19,719 INFO L911 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 [2022-03-19 02:21:19,719 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 134 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:19,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 64 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:21:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 02:21:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-19 02:21:19,794 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) [2022-03-19 02:21:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-03-19 02:21:19,794 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 62 [2022-03-19 02:21:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:19,794 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-03-19 02:21:19,794 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) [2022-03-19 02:21:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-03-19 02:21:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 02:21:19,799 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:19,799 INFO L500 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] [2022-03-19 02:21:19,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:20,015 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 [2022-03-19 02:21:20,016 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 31 times [2022-03-19 02:21:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:20,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875080802] [2022-03-19 02:21:20,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:20,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:20,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 32 times [2022-03-19 02:21:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852344671] [2022-03-19 02:21:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:20,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852344671] [2022-03-19 02:21:20,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852344671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349623566] [2022-03-19 02:21:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:20,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:20,146 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) [2022-03-19 02:21:20,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 02:21:20,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 02:21:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:20,662 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 [2022-03-19 02:21:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-19 02:21:20,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:20,996 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:20,997 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 [2022-03-19 02:21:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-19 02:21:21,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349623566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:21,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:21,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2022-03-19 02:21:21,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:21,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875080802] [2022-03-19 02:21:21,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875080802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:21,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:21,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:21:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078540160] [2022-03-19 02:21:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:21,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:21:21,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:21:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:21:21,054 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) [2022-03-19 02:21:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:21,408 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2022-03-19 02:21:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:21:21,408 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 [2022-03-19 02:21:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:21,409 INFO L225 Difference]: With dead ends: 263 [2022-03-19 02:21:21,409 INFO L226 Difference]: Without dead ends: 158 [2022-03-19 02:21:21,410 INFO L911 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 [2022-03-19 02:21:21,411 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 134 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-19 02:21:21,411 INFO L913 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] [2022-03-19 02:21:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-19 02:21:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-03-19 02:21:21,535 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) [2022-03-19 02:21:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-03-19 02:21:21,541 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 65 [2022-03-19 02:21:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:21,541 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-03-19 02:21:21,542 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) [2022-03-19 02:21:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-03-19 02:21:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 02:21:21,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:21,542 INFO L500 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] [2022-03-19 02:21:21,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:21,760 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 [2022-03-19 02:21:21,760 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 33 times [2022-03-19 02:21:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:21,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804999694] [2022-03-19 02:21:21,774 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:21,774 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:21,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 34 times [2022-03-19 02:21:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:21,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978245752] [2022-03-19 02:21:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:21,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:22,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 02:21:22,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978245752] [2022-03-19 02:21:22,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978245752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736083289] [2022-03-19 02:21:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:22,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:22,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:22,088 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) [2022-03-19 02:21:22,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 02:21:22,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:22,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 02:21:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:22,445 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 [2022-03-19 02:21:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 02:21:22,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:22,646 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-03-19 02:21:22,647 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 [2022-03-19 02:21:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 02:21:22,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736083289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:22,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:22,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 22 [2022-03-19 02:21:22,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804999694] [2022-03-19 02:21:22,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804999694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:22,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:22,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:21:22,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17165135] [2022-03-19 02:21:22,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:22,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:21:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:21:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:21:22,695 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) [2022-03-19 02:21:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:22,935 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2022-03-19 02:21:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:21:22,936 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 [2022-03-19 02:21:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:22,937 INFO L225 Difference]: With dead ends: 263 [2022-03-19 02:21:22,937 INFO L226 Difference]: Without dead ends: 258 [2022-03-19 02:21:22,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:21:22,937 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:22,938 INFO L913 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] [2022-03-19 02:21:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-19 02:21:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 152. [2022-03-19 02:21:23,025 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) [2022-03-19 02:21:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 192 transitions. [2022-03-19 02:21:23,025 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 192 transitions. Word has length 68 [2022-03-19 02:21:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:23,025 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 192 transitions. [2022-03-19 02:21:23,026 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) [2022-03-19 02:21:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 192 transitions. [2022-03-19 02:21:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 02:21:23,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:23,026 INFO L500 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] [2022-03-19 02:21:23,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:23,231 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 [2022-03-19 02:21:23,231 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 1 times [2022-03-19 02:21:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:23,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17125493] [2022-03-19 02:21:23,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:23,234 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:23,234 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 2 times [2022-03-19 02:21:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:23,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712148398] [2022-03-19 02:21:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:23,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712148398] [2022-03-19 02:21:23,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712148398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147288985] [2022-03-19 02:21:23,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:23,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:23,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:23,398 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) [2022-03-19 02:21:23,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 02:21:23,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:23,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 02:21:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-03-19 02:21:23,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:24,196 INFO L356 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2022-03-19 02:21:24,196 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 [2022-03-19 02:21:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-19 02:21:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147288985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:24,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:24,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 25 [2022-03-19 02:21:24,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17125493] [2022-03-19 02:21:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17125493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:24,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:24,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:21:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727581284] [2022-03-19 02:21:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:24,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:21:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:21:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-19 02:21:24,313 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) [2022-03-19 02:21:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:24,753 INFO L93 Difference]: Finished difference Result 243 states and 315 transitions. [2022-03-19 02:21:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:21:24,754 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 [2022-03-19 02:21:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:24,755 INFO L225 Difference]: With dead ends: 243 [2022-03-19 02:21:24,755 INFO L226 Difference]: Without dead ends: 182 [2022-03-19 02:21:24,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:21:24,756 INFO L912 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 [2022-03-19 02:21:24,756 INFO L913 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] [2022-03-19 02:21:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-19 02:21:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2022-03-19 02:21:24,852 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) [2022-03-19 02:21:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2022-03-19 02:21:24,852 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 69 [2022-03-19 02:21:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:24,852 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2022-03-19 02:21:24,853 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) [2022-03-19 02:21:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2022-03-19 02:21:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 02:21:24,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:24,853 INFO L500 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] [2022-03-19 02:21:24,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:25,071 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 [2022-03-19 02:21:25,071 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 3 times [2022-03-19 02:21:25,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:25,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [206892179] [2022-03-19 02:21:25,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:25,073 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:25,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:25,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 4 times [2022-03-19 02:21:25,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:25,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761210205] [2022-03-19 02:21:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:25,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:25,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:25,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761210205] [2022-03-19 02:21:25,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761210205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321793961] [2022-03-19 02:21:25,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:25,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:25,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:25,275 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) [2022-03-19 02:21:25,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 02:21:25,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:21:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:25,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 02:21:25,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321793961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:25,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:25,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-19 02:21:25,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [206892179] [2022-03-19 02:21:25,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [206892179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:25,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:25,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:21:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174813774] [2022-03-19 02:21:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:25,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:21:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:21:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:21:25,746 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) [2022-03-19 02:21:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:26,217 INFO L93 Difference]: Finished difference Result 297 states and 386 transitions. [2022-03-19 02:21:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:21:26,218 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 [2022-03-19 02:21:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:26,231 INFO L225 Difference]: With dead ends: 297 [2022-03-19 02:21:26,231 INFO L226 Difference]: Without dead ends: 172 [2022-03-19 02:21:26,232 INFO L911 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 [2022-03-19 02:21:26,233 INFO L912 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 [2022-03-19 02:21:26,233 INFO L913 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] [2022-03-19 02:21:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-19 02:21:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2022-03-19 02:21:26,338 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) [2022-03-19 02:21:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2022-03-19 02:21:26,339 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 72 [2022-03-19 02:21:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:26,339 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2022-03-19 02:21:26,339 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) [2022-03-19 02:21:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2022-03-19 02:21:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 02:21:26,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:26,340 INFO L500 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] [2022-03-19 02:21:26,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:26,553 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 [2022-03-19 02:21:26,554 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 5 times [2022-03-19 02:21:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:26,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445901043] [2022-03-19 02:21:26,555 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:26,555 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:26,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 6 times [2022-03-19 02:21:26,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:26,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407995925] [2022-03-19 02:21:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:26,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 02:21:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407995925] [2022-03-19 02:21:26,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407995925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:26,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679798005] [2022-03-19 02:21:26,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:26,655 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) [2022-03-19 02:21:26,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 02:21:26,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 02:21:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-19 02:21:26,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 02:21:26,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679798005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:26,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:26,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-03-19 02:21:26,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445901043] [2022-03-19 02:21:26,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445901043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:26,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:26,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:21:26,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226834125] [2022-03-19 02:21:26,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:26,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:21:26,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:21:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:21:26,932 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) [2022-03-19 02:21:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:27,492 INFO L93 Difference]: Finished difference Result 732 states and 956 transitions. [2022-03-19 02:21:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:21:27,492 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 [2022-03-19 02:21:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:27,494 INFO L225 Difference]: With dead ends: 732 [2022-03-19 02:21:27,494 INFO L226 Difference]: Without dead ends: 658 [2022-03-19 02:21:27,494 INFO L911 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 [2022-03-19 02:21:27,495 INFO L912 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 [2022-03-19 02:21:27,495 INFO L913 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] [2022-03-19 02:21:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-19 02:21:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 170. [2022-03-19 02:21:27,576 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) [2022-03-19 02:21:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-03-19 02:21:27,577 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 75 [2022-03-19 02:21:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:27,577 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-03-19 02:21:27,577 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) [2022-03-19 02:21:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-03-19 02:21:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 02:21:27,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:27,578 INFO L500 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] [2022-03-19 02:21:27,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:27,795 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 [2022-03-19 02:21:27,795 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 7 times [2022-03-19 02:21:27,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:27,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974694775] [2022-03-19 02:21:27,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:27,797 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:27,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 8 times [2022-03-19 02:21:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:27,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300690304] [2022-03-19 02:21:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:27,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 02:21:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300690304] [2022-03-19 02:21:27,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300690304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121132884] [2022-03-19 02:21:27,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:27,917 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) [2022-03-19 02:21:27,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 02:21:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 02:21:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:28,445 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 [2022-03-19 02:21:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 02:21:28,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:28,870 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-03-19 02:21:28,870 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 [2022-03-19 02:21:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 02:21:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121132884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:28,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:28,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 24 [2022-03-19 02:21:28,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974694775] [2022-03-19 02:21:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974694775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:28,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:28,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:21:28,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017864736] [2022-03-19 02:21:28,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:28,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:21:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:21:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:21:28,942 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) [2022-03-19 02:21:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:29,622 INFO L93 Difference]: Finished difference Result 747 states and 975 transitions. [2022-03-19 02:21:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:21:29,622 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 [2022-03-19 02:21:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:29,624 INFO L225 Difference]: With dead ends: 747 [2022-03-19 02:21:29,624 INFO L226 Difference]: Without dead ends: 673 [2022-03-19 02:21:29,624 INFO L911 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 [2022-03-19 02:21:29,625 INFO L912 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 [2022-03-19 02:21:29,625 INFO L913 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] [2022-03-19 02:21:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-19 02:21:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 172. [2022-03-19 02:21:29,711 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) [2022-03-19 02:21:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 217 transitions. [2022-03-19 02:21:29,714 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 217 transitions. Word has length 79 [2022-03-19 02:21:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:29,718 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 217 transitions. [2022-03-19 02:21:29,718 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) [2022-03-19 02:21:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 217 transitions. [2022-03-19 02:21:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 02:21:29,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:29,719 INFO L500 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] [2022-03-19 02:21:29,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:29,938 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 [2022-03-19 02:21:29,938 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:29,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 9 times [2022-03-19 02:21:29,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:29,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [460372059] [2022-03-19 02:21:29,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:29,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:29,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 10 times [2022-03-19 02:21:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:29,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299743566] [2022-03-19 02:21:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 02:21:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299743566] [2022-03-19 02:21:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299743566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732987591] [2022-03-19 02:21:30,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:30,047 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) [2022-03-19 02:21:30,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 02:21:30,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:30,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 02:21:30,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:30,569 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 [2022-03-19 02:21:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-03-19 02:21:30,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:30,986 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-03-19 02:21:30,986 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 [2022-03-19 02:21:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:21:31,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732987591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:31,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:31,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 26 [2022-03-19 02:21:31,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [460372059] [2022-03-19 02:21:31,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [460372059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:31,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:31,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:21:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565857348] [2022-03-19 02:21:31,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:31,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:21:31,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:21:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:21:31,056 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) [2022-03-19 02:21:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:32,074 INFO L93 Difference]: Finished difference Result 1125 states and 1475 transitions. [2022-03-19 02:21:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:21:32,075 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 [2022-03-19 02:21:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:32,079 INFO L225 Difference]: With dead ends: 1125 [2022-03-19 02:21:32,079 INFO L226 Difference]: Without dead ends: 1051 [2022-03-19 02:21:32,080 INFO L911 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 [2022-03-19 02:21:32,080 INFO L912 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 [2022-03-19 02:21:32,080 INFO L913 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] [2022-03-19 02:21:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-03-19 02:21:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 176. [2022-03-19 02:21:32,174 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) [2022-03-19 02:21:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2022-03-19 02:21:32,175 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 81 [2022-03-19 02:21:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:32,175 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2022-03-19 02:21:32,175 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) [2022-03-19 02:21:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2022-03-19 02:21:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 02:21:32,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:32,176 INFO L500 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] [2022-03-19 02:21:32,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:32,391 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 [2022-03-19 02:21:32,391 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 11 times [2022-03-19 02:21:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:32,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847112765] [2022-03-19 02:21:32,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:32,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:32,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash 315077885, now seen corresponding path program 12 times [2022-03-19 02:21:32,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:32,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312053320] [2022-03-19 02:21:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:32,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 02:21:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312053320] [2022-03-19 02:21:32,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312053320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770154342] [2022-03-19 02:21:32,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:32,583 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) [2022-03-19 02:21:32,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 02:21:32,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:21:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:21:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-03-19 02:21:33,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:33,210 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-19 02:21:33,210 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 [2022-03-19 02:21:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-03-19 02:21:33,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770154342] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:33,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-19 02:21:33,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 10] total 26 [2022-03-19 02:21:33,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:33,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847112765] [2022-03-19 02:21:33,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847112765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:33,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:33,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:21:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640491009] [2022-03-19 02:21:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:33,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:21:33,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:21:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:21:33,249 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) [2022-03-19 02:21:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:33,478 INFO L93 Difference]: Finished difference Result 319 states and 411 transitions. [2022-03-19 02:21:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:21:33,479 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 [2022-03-19 02:21:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:33,479 INFO L225 Difference]: With dead ends: 319 [2022-03-19 02:21:33,479 INFO L226 Difference]: Without dead ends: 243 [2022-03-19 02:21:33,480 INFO L911 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 [2022-03-19 02:21:33,480 INFO L912 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 [2022-03-19 02:21:33,480 INFO L913 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] [2022-03-19 02:21:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-19 02:21:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 165. [2022-03-19 02:21:33,576 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) [2022-03-19 02:21:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 207 transitions. [2022-03-19 02:21:33,577 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 207 transitions. Word has length 85 [2022-03-19 02:21:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:33,577 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 207 transitions. [2022-03-19 02:21:33,577 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) [2022-03-19 02:21:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 207 transitions. [2022-03-19 02:21:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:21:33,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:33,578 INFO L500 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] [2022-03-19 02:21:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:33,791 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 [2022-03-19 02:21:33,792 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 1 times [2022-03-19 02:21:33,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689328158] [2022-03-19 02:21:33,793 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:33,793 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:33,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 2 times [2022-03-19 02:21:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:33,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124058074] [2022-03-19 02:21:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:33,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-19 02:21:36,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124058074] [2022-03-19 02:21:36,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124058074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384801863] [2022-03-19 02:21:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:36,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:36,076 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) [2022-03-19 02:21:36,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 02:21:36,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 02:21:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:36,315 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 [2022-03-19 02:21:36,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:36,438 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 23 treesize of output 23 [2022-03-19 02:21:36,498 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 23 treesize of output 23 [2022-03-19 02:21:36,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:36,570 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 [2022-03-19 02:21:36,592 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 [2022-03-19 02:21:36,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:36,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:36,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:36,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:36,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:37,678 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 [2022-03-19 02:21:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 93 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-19 02:21:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:38,979 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 [2022-03-19 02:21:39,083 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 [2022-03-19 02:21:39,092 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 [2022-03-19 02:21:39,108 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 [2022-03-19 02:21:39,133 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 [2022-03-19 02:21:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-19 02:21:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384801863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:39,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:39,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 21] total 65 [2022-03-19 02:21:39,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689328158] [2022-03-19 02:21:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689328158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:39,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:39,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 02:21:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088378597] [2022-03-19 02:21:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:39,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 02:21:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 02:21:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3224, Unknown=5, NotChecked=600, Total=4160 [2022-03-19 02:21:39,149 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) [2022-03-19 02:21:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:42,824 INFO L93 Difference]: Finished difference Result 434 states and 562 transitions. [2022-03-19 02:21:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 02:21:42,825 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 [2022-03-19 02:21:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:42,826 INFO L225 Difference]: With dead ends: 434 [2022-03-19 02:21:42,826 INFO L226 Difference]: Without dead ends: 395 [2022-03-19 02:21:42,828 INFO L911 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 [2022-03-19 02:21:42,832 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 410 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2022-03-19 02:21:42,832 INFO L913 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] [2022-03-19 02:21:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-19 02:21:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 282. [2022-03-19 02:21:43,044 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) [2022-03-19 02:21:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 361 transitions. [2022-03-19 02:21:43,045 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 361 transitions. Word has length 102 [2022-03-19 02:21:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:43,045 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 361 transitions. [2022-03-19 02:21:43,045 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) [2022-03-19 02:21:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 361 transitions. [2022-03-19 02:21:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:21:43,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:43,046 INFO L500 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] [2022-03-19 02:21:43,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 02:21:43,262 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 [2022-03-19 02:21:43,263 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 1 times [2022-03-19 02:21:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694549477] [2022-03-19 02:21:43,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:43,264 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:43,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 2 times [2022-03-19 02:21:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900664733] [2022-03-19 02:21:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:43,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-19 02:21:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:43,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900664733] [2022-03-19 02:21:43,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900664733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:43,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241725766] [2022-03-19 02:21:43,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:43,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:43,962 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) [2022-03-19 02:21:43,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 02:21:44,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:44,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 02:21:44,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:44,211 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 [2022-03-19 02:21:44,242 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 23 treesize of output 23 [2022-03-19 02:21:44,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,374 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 [2022-03-19 02:21:44,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:21:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-19 02:21:44,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:45,384 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 [2022-03-19 02:21:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-19 02:21:45,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241725766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:45,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:45,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 34 [2022-03-19 02:21:45,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694549477] [2022-03-19 02:21:45,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694549477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:45,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:45,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:21:45,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393656459] [2022-03-19 02:21:45,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:45,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:21:45,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:21:45,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=934, Unknown=1, NotChecked=62, Total=1122 [2022-03-19 02:21:45,506 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) [2022-03-19 02:21:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:46,561 INFO L93 Difference]: Finished difference Result 449 states and 578 transitions. [2022-03-19 02:21:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:21:46,561 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 [2022-03-19 02:21:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:46,562 INFO L225 Difference]: With dead ends: 449 [2022-03-19 02:21:46,562 INFO L226 Difference]: Without dead ends: 321 [2022-03-19 02:21:46,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=1778, Unknown=1, NotChecked=86, Total=2070 [2022-03-19 02:21:46,563 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 103 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:46,563 INFO L913 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] [2022-03-19 02:21:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-19 02:21:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2022-03-19 02:21:46,795 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) [2022-03-19 02:21:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 406 transitions. [2022-03-19 02:21:46,796 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 406 transitions. Word has length 102 [2022-03-19 02:21:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:46,796 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 406 transitions. [2022-03-19 02:21:46,796 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) [2022-03-19 02:21:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 406 transitions. [2022-03-19 02:21:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:21:46,797 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:46,797 INFO L500 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] [2022-03-19 02:21:46,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 02:21:47,014 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 [2022-03-19 02:21:47,015 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 1 times [2022-03-19 02:21:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:47,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [714784086] [2022-03-19 02:21:47,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:47,016 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:47,016 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 2 times [2022-03-19 02:21:47,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:47,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250624201] [2022-03-19 02:21:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:47,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:47,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 02:21:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:47,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250624201] [2022-03-19 02:21:47,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250624201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:47,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106589560] [2022-03-19 02:21:47,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:47,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:47,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:47,616 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) [2022-03-19 02:21:47,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 02:21:47,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 02:21:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:47,954 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 [2022-03-19 02:21:47,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 02:21:48,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 02:21:48,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 02:21:48,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:21:48,267 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 25 treesize of output 25 [2022-03-19 02:21:48,945 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:21:48,946 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 [2022-03-19 02:21:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 83 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 02:21:49,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:01,090 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 [2022-03-19 02:22:01,185 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 [2022-03-19 02:22:01,199 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 1) 4294967296) 10))) is different from false [2022-03-19 02:22:01,223 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 [2022-03-19 02:22:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-03-19 02:22:01,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106589560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:01,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:01,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 19] total 44 [2022-03-19 02:22:01,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:01,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [714784086] [2022-03-19 02:22:01,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [714784086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:01,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:01,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:22:01,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112177541] [2022-03-19 02:22:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:01,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:22:01,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:22:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1335, Unknown=10, NotChecked=316, Total=1892 [2022-03-19 02:22:01,250 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) [2022-03-19 02:22:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:02,220 INFO L93 Difference]: Finished difference Result 509 states and 653 transitions. [2022-03-19 02:22:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:22:02,221 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 [2022-03-19 02:22:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:02,223 INFO L225 Difference]: With dead ends: 509 [2022-03-19 02:22:02,223 INFO L226 Difference]: Without dead ends: 318 [2022-03-19 02:22:02,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=289, Invalid=2069, Unknown=10, NotChecked=388, Total=2756 [2022-03-19 02:22:02,225 INFO L912 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 [2022-03-19 02:22:02,225 INFO L913 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] [2022-03-19 02:22:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-19 02:22:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-03-19 02:22:02,511 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) [2022-03-19 02:22:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 403 transitions. [2022-03-19 02:22:02,512 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 403 transitions. Word has length 102 [2022-03-19 02:22:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:02,512 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 403 transitions. [2022-03-19 02:22:02,512 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) [2022-03-19 02:22:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 403 transitions. [2022-03-19 02:22:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:22:02,513 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:02,513 INFO L500 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] [2022-03-19 02:22:02,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 02:22:02,744 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 [2022-03-19 02:22:02,745 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1906970572, now seen corresponding path program 3 times [2022-03-19 02:22:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:02,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092645172] [2022-03-19 02:22:02,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:02,746 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:02,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1906970572, now seen corresponding path program 4 times [2022-03-19 02:22:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760644784] [2022-03-19 02:22:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:02,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:04,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 199 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-03-19 02:22:04,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760644784] [2022-03-19 02:22:04,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760644784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092429969] [2022-03-19 02:22:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:22:04,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:04,882 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) [2022-03-19 02:22:04,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 02:22:05,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:22:05,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:05,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 02:22:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:05,076 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 [2022-03-19 02:22:05,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,182 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 25 treesize of output 25 [2022-03-19 02:22:05,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,310 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 [2022-03-19 02:22:05,330 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 25 treesize of output 25 [2022-03-19 02:22:05,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:05,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:08,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:08,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:08,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:22:08,361 INFO L356 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2022-03-19 02:22:08,361 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 [2022-03-19 02:22:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 98 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-19 02:22:08,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:13,948 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 [2022-03-19 02:22:31,483 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 [2022-03-19 02:22:32,821 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 [2022-03-19 02:22:34,496 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 [2022-03-19 02:22:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-19 02:22:35,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092429969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:35,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:35,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 20] total 62 [2022-03-19 02:22:35,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092645172] [2022-03-19 02:22:35,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092645172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:35,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:35,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 02:22:35,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553874701] [2022-03-19 02:22:35,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:35,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 02:22:35,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 02:22:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3034, Unknown=4, NotChecked=460, Total=3782 [2022-03-19 02:22:35,432 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) [2022-03-19 02:22:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:38,377 INFO L93 Difference]: Finished difference Result 588 states and 758 transitions. [2022-03-19 02:22:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 02:22:38,378 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 [2022-03-19 02:22:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:38,386 INFO L225 Difference]: With dead ends: 588 [2022-03-19 02:22:38,386 INFO L226 Difference]: Without dead ends: 549 [2022-03-19 02:22:38,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=680, Invalid=6472, Unknown=4, NotChecked=676, Total=7832 [2022-03-19 02:22:38,389 INFO L912 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 [2022-03-19 02:22:38,389 INFO L913 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] [2022-03-19 02:22:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-19 02:22:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 306. [2022-03-19 02:22:38,678 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) [2022-03-19 02:22:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 389 transitions. [2022-03-19 02:22:38,679 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 389 transitions. Word has length 102 [2022-03-19 02:22:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:38,679 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 389 transitions. [2022-03-19 02:22:38,679 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) [2022-03-19 02:22:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 389 transitions. [2022-03-19 02:22:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:22:38,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:38,680 INFO L500 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] [2022-03-19 02:22:38,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 02:22:38,897 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 [2022-03-19 02:22:38,897 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 1 times [2022-03-19 02:22:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:38,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313922895] [2022-03-19 02:22:38,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:38,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:38,899 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2022-03-19 02:22:38,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:38,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781393834] [2022-03-19 02:22:38,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:38,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:39,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-19 02:22:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:39,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781393834] [2022-03-19 02:22:39,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781393834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:39,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508187770] [2022-03-19 02:22:39,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:22:39,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:39,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:39,564 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) [2022-03-19 02:22:39,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 02:22:39,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:22:39,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 02:22:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:39,900 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 [2022-03-19 02:22:39,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:39,974 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 [2022-03-19 02:22:39,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:22:40,741 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:22:40,742 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 [2022-03-19 02:22:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 02:22:40,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:54,383 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 [2022-03-19 02:22:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-19 02:22:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508187770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:54,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:54,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 41 [2022-03-19 02:22:54,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313922895] [2022-03-19 02:22:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313922895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:54,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:54,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:22:54,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050095561] [2022-03-19 02:22:54,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:54,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:22:54,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:22:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1343, Unknown=8, NotChecked=76, Total=1640 [2022-03-19 02:22:54,510 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) [2022-03-19 02:22:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:55,574 INFO L93 Difference]: Finished difference Result 458 states and 583 transitions. [2022-03-19 02:22:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:22:55,574 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 [2022-03-19 02:22:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:55,575 INFO L225 Difference]: With dead ends: 458 [2022-03-19 02:22:55,575 INFO L226 Difference]: Without dead ends: 306 [2022-03-19 02:22:55,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=287, Invalid=2159, Unknown=8, NotChecked=96, Total=2550 [2022-03-19 02:22:55,576 INFO L912 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 [2022-03-19 02:22:55,576 INFO L913 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] [2022-03-19 02:22:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-19 02:22:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-19 02:22:55,815 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) [2022-03-19 02:22:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 387 transitions. [2022-03-19 02:22:55,816 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 387 transitions. Word has length 102 [2022-03-19 02:22:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:55,816 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 387 transitions. [2022-03-19 02:22:55,816 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) [2022-03-19 02:22:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 387 transitions. [2022-03-19 02:22:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:22:55,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:55,817 INFO L500 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] [2022-03-19 02:22:55,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 02:22:56,031 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 [2022-03-19 02:22:56,032 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2022-03-19 02:22:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261854902] [2022-03-19 02:22:56,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:56,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:56,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 4 times [2022-03-19 02:22:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280777719] [2022-03-19 02:22:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:56,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:22:56,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:56,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280777719] [2022-03-19 02:22:56,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280777719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:56,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932908176] [2022-03-19 02:22:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:22:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:56,669 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) [2022-03-19 02:22:56,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 02:22:56,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:22:56,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:56,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 02:22:56,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:56,957 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 [2022-03-19 02:22:56,987 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 25 treesize of output 25 [2022-03-19 02:22:57,032 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 25 treesize of output 25 [2022-03-19 02:22:57,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:57,108 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 25 treesize of output 25 [2022-03-19 02:22:57,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:57,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:57,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:57,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:57,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:57,271 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 25 treesize of output 25 [2022-03-19 02:22:57,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:22:58,140 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-19 02:22:58,140 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 [2022-03-19 02:22:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-19 02:22:58,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:01,054 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 [2022-03-19 02:23:02,147 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 [2022-03-19 02:23:02,227 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 [2022-03-19 02:23:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 241 trivial. 28 not checked. [2022-03-19 02:23:02,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932908176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:02,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:02,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 40 [2022-03-19 02:23:02,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:02,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261854902] [2022-03-19 02:23:02,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261854902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:02,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:02,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:23:02,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105171013] [2022-03-19 02:23:02,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:02,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:23:02,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:02,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:23:02,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1188, Unknown=3, NotChecked=216, Total=1560 [2022-03-19 02:23:02,319 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) [2022-03-19 02:23:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:03,392 INFO L93 Difference]: Finished difference Result 458 states and 579 transitions. [2022-03-19 02:23:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:23:03,392 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 [2022-03-19 02:23:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:03,393 INFO L225 Difference]: With dead ends: 458 [2022-03-19 02:23:03,393 INFO L226 Difference]: Without dead ends: 306 [2022-03-19 02:23:03,394 INFO L911 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 [2022-03-19 02:23:03,394 INFO L912 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 [2022-03-19 02:23:03,394 INFO L913 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] [2022-03-19 02:23:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-19 02:23:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-03-19 02:23:03,629 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) [2022-03-19 02:23:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 385 transitions. [2022-03-19 02:23:03,630 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 385 transitions. Word has length 102 [2022-03-19 02:23:03,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:03,630 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 385 transitions. [2022-03-19 02:23:03,630 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) [2022-03-19 02:23:03,630 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 385 transitions. [2022-03-19 02:23:03,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:23:03,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:03,631 INFO L500 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] [2022-03-19 02:23:03,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 02:23:03,835 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 [2022-03-19 02:23:03,836 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 5 times [2022-03-19 02:23:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898755921] [2022-03-19 02:23:03,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:03,837 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:03,837 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 6 times [2022-03-19 02:23:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667137237] [2022-03-19 02:23:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 02:23:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667137237] [2022-03-19 02:23:05,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667137237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825056039] [2022-03-19 02:23:05,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:23:05,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:05,084 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) [2022-03-19 02:23:05,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 02:23:05,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:23:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 02:23:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:23:28,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:23:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:23:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:23:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:23:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:23:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:23:29,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:23:29,004 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:23:29,004 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 [2022-03-19 02:23:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 114 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-19 02:23:29,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 87 proven. 123 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 02:23:42,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825056039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:42,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:42,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 27] total 71 [2022-03-19 02:23:42,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898755921] [2022-03-19 02:23:42,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898755921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:42,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:42,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:23:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258649679] [2022-03-19 02:23:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:42,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:23:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:23:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=4141, Unknown=14, NotChecked=0, Total=4970 [2022-03-19 02:23:42,881 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) [2022-03-19 02:23:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:44,205 INFO L93 Difference]: Finished difference Result 787 states and 998 transitions. [2022-03-19 02:23:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:23:44,206 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 [2022-03-19 02:23:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:44,208 INFO L225 Difference]: With dead ends: 787 [2022-03-19 02:23:44,208 INFO L226 Difference]: Without dead ends: 733 [2022-03-19 02:23:44,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=1139, Invalid=6329, Unknown=14, NotChecked=0, Total=7482 [2022-03-19 02:23:44,210 INFO L912 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 [2022-03-19 02:23:44,211 INFO L913 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] [2022-03-19 02:23:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-19 02:23:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 513. [2022-03-19 02:23:44,631 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) [2022-03-19 02:23:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 649 transitions. [2022-03-19 02:23:44,632 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 649 transitions. Word has length 102 [2022-03-19 02:23:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:44,632 INFO L478 AbstractCegarLoop]: Abstraction has 513 states and 649 transitions. [2022-03-19 02:23:44,632 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) [2022-03-19 02:23:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 649 transitions. [2022-03-19 02:23:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:23:44,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:44,633 INFO L500 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] [2022-03-19 02:23:44,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 02:23:44,839 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 [2022-03-19 02:23:44,839 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 7 times [2022-03-19 02:23:44,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:44,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978154814] [2022-03-19 02:23:44,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:44,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:44,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 8 times [2022-03-19 02:23:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:44,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522210507] [2022-03-19 02:23:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-19 02:23:46,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:46,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522210507] [2022-03-19 02:23:46,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522210507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:46,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717272945] [2022-03-19 02:23:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:23:46,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:46,542 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) [2022-03-19 02:23:46,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 02:23:46,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:23:46,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 02:23:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:46,776 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 [2022-03-19 02:23:46,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:46,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:46,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:46,995 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 [2022-03-19 02:23:47,017 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 [2022-03-19 02:23:47,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:47,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:47,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:47,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:47,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:47,153 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 [2022-03-19 02:23:48,287 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-19 02:23:48,288 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 [2022-03-19 02:23:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-19 02:23:48,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:51,417 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 [2022-03-19 02:23:52,161 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 [2022-03-19 02:23:52,216 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 [2022-03-19 02:23:52,350 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 [2022-03-19 02:23:52,428 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 [2022-03-19 02:23:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 8 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-19 02:23:52,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717272945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:52,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:52,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 20] total 58 [2022-03-19 02:23:52,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:52,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978154814] [2022-03-19 02:23:52,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978154814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:52,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:52,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 02:23:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645677865] [2022-03-19 02:23:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:52,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 02:23:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 02:23:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2458, Unknown=5, NotChecked=530, Total=3306 [2022-03-19 02:23:52,462 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) [2022-03-19 02:23:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:55,374 INFO L93 Difference]: Finished difference Result 1136 states and 1450 transitions. [2022-03-19 02:23:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 02:23:55,375 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 [2022-03-19 02:23:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:55,377 INFO L225 Difference]: With dead ends: 1136 [2022-03-19 02:23:55,377 INFO L226 Difference]: Without dead ends: 896 [2022-03-19 02:23:55,378 INFO L911 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 [2022-03-19 02:23:55,379 INFO L912 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 [2022-03-19 02:23:55,380 INFO L913 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] [2022-03-19 02:23:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-03-19 02:23:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 718. [2022-03-19 02:23:55,981 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) [2022-03-19 02:23:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 908 transitions. [2022-03-19 02:23:55,983 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 908 transitions. Word has length 102 [2022-03-19 02:23:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:55,983 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 908 transitions. [2022-03-19 02:23:55,983 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) [2022-03-19 02:23:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 908 transitions. [2022-03-19 02:23:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:23:55,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:55,984 INFO L500 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] [2022-03-19 02:23:56,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 02:23:56,201 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 [2022-03-19 02:23:56,201 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 9 times [2022-03-19 02:23:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151209222] [2022-03-19 02:23:56,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:56,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:56,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 10 times [2022-03-19 02:23:56,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:56,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146068083] [2022-03-19 02:23:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:56,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:57,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 149 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 02:23:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146068083] [2022-03-19 02:23:57,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146068083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:57,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278909550] [2022-03-19 02:23:57,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:23:57,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:57,885 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) [2022-03-19 02:23:57,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 02:23:58,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:23:58,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:58,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 02:23:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:58,165 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 [2022-03-19 02:23:58,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,375 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 23 treesize of output 23 [2022-03-19 02:23:58,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:23:58,907 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 [2022-03-19 02:23:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:23:58,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:59,925 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 [2022-03-19 02:24:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-19 02:24:00,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278909550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:00,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:00,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 17] total 51 [2022-03-19 02:24:00,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:00,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151209222] [2022-03-19 02:24:00,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151209222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:00,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:00,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 02:24:00,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676858456] [2022-03-19 02:24:00,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:00,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 02:24:00,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 02:24:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2193, Unknown=1, NotChecked=96, Total=2550 [2022-03-19 02:24:00,048 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) [2022-03-19 02:24:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:02,196 INFO L93 Difference]: Finished difference Result 1515 states and 1906 transitions. [2022-03-19 02:24:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 02:24:02,196 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 [2022-03-19 02:24:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:02,200 INFO L225 Difference]: With dead ends: 1515 [2022-03-19 02:24:02,200 INFO L226 Difference]: Without dead ends: 1467 [2022-03-19 02:24:02,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=478, Invalid=4355, Unknown=1, NotChecked=136, Total=4970 [2022-03-19 02:24:02,201 INFO L912 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 [2022-03-19 02:24:02,201 INFO L913 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] [2022-03-19 02:24:02,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-19 02:24:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1235. [2022-03-19 02:24:03,276 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) [2022-03-19 02:24:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1563 transitions. [2022-03-19 02:24:03,278 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1563 transitions. Word has length 102 [2022-03-19 02:24:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:03,278 INFO L478 AbstractCegarLoop]: Abstraction has 1235 states and 1563 transitions. [2022-03-19 02:24:03,278 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) [2022-03-19 02:24:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1563 transitions. [2022-03-19 02:24:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:24:03,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:03,280 INFO L500 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] [2022-03-19 02:24:03,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:03,503 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 [2022-03-19 02:24:03,503 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 11 times [2022-03-19 02:24:03,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:03,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [519992389] [2022-03-19 02:24:03,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:03,505 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:03,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 12 times [2022-03-19 02:24:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:03,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358988487] [2022-03-19 02:24:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 172 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-19 02:24:05,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358988487] [2022-03-19 02:24:05,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358988487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083274209] [2022-03-19 02:24:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:05,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:05,413 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) [2022-03-19 02:24:05,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 02:24:06,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 02:24:06,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 02:24:06,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:06,290 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 [2022-03-19 02:24:06,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,418 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 [2022-03-19 02:24:06,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:06,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:07,322 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:24:07,323 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 [2022-03-19 02:24:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-19 02:24:07,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:17,991 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 [2022-03-19 02:24:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-19 02:24:18,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083274209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:18,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:18,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13, 15] total 54 [2022-03-19 02:24:18,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:18,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [519992389] [2022-03-19 02:24:18,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [519992389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:18,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:18,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 02:24:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602854007] [2022-03-19 02:24:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:18,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 02:24:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 02:24:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2477, Unknown=7, NotChecked=102, Total=2862 [2022-03-19 02:24:18,127 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) [2022-03-19 02:24:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:22,390 INFO L93 Difference]: Finished difference Result 2366 states and 2996 transitions. [2022-03-19 02:24:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 02:24:22,390 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 [2022-03-19 02:24:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:22,395 INFO L225 Difference]: With dead ends: 2366 [2022-03-19 02:24:22,395 INFO L226 Difference]: Without dead ends: 1900 [2022-03-19 02:24:22,397 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=738, Invalid=6741, Unknown=7, NotChecked=170, Total=7656 [2022-03-19 02:24:22,397 INFO L912 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 [2022-03-19 02:24:22,397 INFO L913 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] [2022-03-19 02:24:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-03-19 02:24:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1712. [2022-03-19 02:24:23,900 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) [2022-03-19 02:24:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2160 transitions. [2022-03-19 02:24:23,903 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2160 transitions. Word has length 102 [2022-03-19 02:24:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:23,903 INFO L478 AbstractCegarLoop]: Abstraction has 1712 states and 2160 transitions. [2022-03-19 02:24:23,903 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) [2022-03-19 02:24:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2160 transitions. [2022-03-19 02:24:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:24:23,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:23,906 INFO L500 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] [2022-03-19 02:24:23,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:24,123 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 [2022-03-19 02:24:24,124 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 13 times [2022-03-19 02:24:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991874581] [2022-03-19 02:24:24,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:24,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:24,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 14 times [2022-03-19 02:24:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:24,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728789315] [2022-03-19 02:24:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 173 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 02:24:26,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728789315] [2022-03-19 02:24:26,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728789315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645324643] [2022-03-19 02:24:26,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:26,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:26,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:26,046 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) [2022-03-19 02:24:26,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 02:24:26,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 02:24:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:26,315 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 [2022-03-19 02:24:26,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:26,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:26,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:26,532 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 [2022-03-19 02:24:26,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:26,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:26,599 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 [2022-03-19 02:24:26,622 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 [2022-03-19 02:24:26,644 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 [2022-03-19 02:24:26,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:26,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:24:27,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:24:27,981 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 [2022-03-19 02:24:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 83 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 02:24:28,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:29,177 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 [2022-03-19 02:24:29,233 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 [2022-03-19 02:24:29,240 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 [2022-03-19 02:24:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-03-19 02:24:29,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645324643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:29,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:29,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 23] total 66 [2022-03-19 02:24:29,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991874581] [2022-03-19 02:24:29,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991874581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:29,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:29,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 02:24:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078402561] [2022-03-19 02:24:29,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:29,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 02:24:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 02:24:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3448, Unknown=27, NotChecked=372, Total=4290 [2022-03-19 02:24:29,419 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) [2022-03-19 02:24:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:33,438 INFO L93 Difference]: Finished difference Result 2059 states and 2603 transitions. [2022-03-19 02:24:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 02:24:33,439 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 [2022-03-19 02:24:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:33,443 INFO L225 Difference]: With dead ends: 2059 [2022-03-19 02:24:33,443 INFO L226 Difference]: Without dead ends: 2017 [2022-03-19 02:24:33,444 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=814, Invalid=7003, Unknown=27, NotChecked=528, Total=8372 [2022-03-19 02:24:33,444 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 309 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:33,445 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 97 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:24:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-03-19 02:24:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1906. [2022-03-19 02:24:35,121 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) [2022-03-19 02:24:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2401 transitions. [2022-03-19 02:24:35,152 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2401 transitions. Word has length 102 [2022-03-19 02:24:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:35,152 INFO L478 AbstractCegarLoop]: Abstraction has 1906 states and 2401 transitions. [2022-03-19 02:24:35,152 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) [2022-03-19 02:24:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2401 transitions. [2022-03-19 02:24:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:24:35,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:35,155 INFO L500 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] [2022-03-19 02:24:35,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:35,372 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 [2022-03-19 02:24:35,372 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 15 times [2022-03-19 02:24:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:35,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498743834] [2022-03-19 02:24:35,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:35,374 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:35,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 16 times [2022-03-19 02:24:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:35,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072799488] [2022-03-19 02:24:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:35,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 02:24:35,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:35,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072799488] [2022-03-19 02:24:35,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072799488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:35,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793446544] [2022-03-19 02:24:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:35,578 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) [2022-03-19 02:24:35,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 02:24:35,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:35,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 02:24:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 02:24:36,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 02:24:36,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793446544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:36,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:36,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-03-19 02:24:36,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:36,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498743834] [2022-03-19 02:24:36,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498743834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:36,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:36,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:24:36,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153952588] [2022-03-19 02:24:36,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:36,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:24:36,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:24:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:24:36,669 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) [2022-03-19 02:24:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:48,753 INFO L93 Difference]: Finished difference Result 10879 states and 13573 transitions. [2022-03-19 02:24:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 02:24:48,753 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 [2022-03-19 02:24:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:48,786 INFO L225 Difference]: With dead ends: 10879 [2022-03-19 02:24:48,786 INFO L226 Difference]: Without dead ends: 10871 [2022-03-19 02:24:48,790 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 02:24:48,790 INFO L912 BasicCegarLoop]: 206 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:48,792 INFO L913 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] [2022-03-19 02:24:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2022-03-19 02:24:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 7361. [2022-03-19 02:24:56,307 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) [2022-03-19 02:24:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 9269 transitions. [2022-03-19 02:24:56,318 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 9269 transitions. Word has length 102 [2022-03-19 02:24:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:56,318 INFO L478 AbstractCegarLoop]: Abstraction has 7361 states and 9269 transitions. [2022-03-19 02:24:56,318 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) [2022-03-19 02:24:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 9269 transitions. [2022-03-19 02:24:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:24:56,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:56,343 INFO L500 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] [2022-03-19 02:24:56,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 02:24:56,562 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 [2022-03-19 02:24:56,562 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 17 times [2022-03-19 02:24:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:56,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702098764] [2022-03-19 02:24:56,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:56,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:56,564 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 18 times [2022-03-19 02:24:56,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:56,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230305403] [2022-03-19 02:24:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:58,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 88 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-03-19 02:24:58,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:58,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230305403] [2022-03-19 02:24:58,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230305403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:58,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726076590] [2022-03-19 02:24:58,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:58,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:58,026 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) [2022-03-19 02:24:58,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 02:24:58,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:24:58,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 02:24:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:59,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:24:59,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:24:59,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:24:59,533 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:24:59,533 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 [2022-03-19 02:24:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 92 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-19 02:24:59,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:00,194 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-03-19 02:25:00,194 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 [2022-03-19 02:25:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 02:25:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726076590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:00,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 54 [2022-03-19 02:25:00,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:00,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702098764] [2022-03-19 02:25:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702098764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:00,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 02:25:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096576403] [2022-03-19 02:25:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:00,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 02:25:00,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 02:25:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 02:25:00,891 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) [2022-03-19 02:25:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:09,953 INFO L93 Difference]: Finished difference Result 8826 states and 11122 transitions. [2022-03-19 02:25:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:25:09,953 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 [2022-03-19 02:25:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:09,970 INFO L225 Difference]: With dead ends: 8826 [2022-03-19 02:25:09,970 INFO L226 Difference]: Without dead ends: 7598 [2022-03-19 02:25:09,974 INFO L911 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 [2022-03-19 02:25:09,975 INFO L912 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 [2022-03-19 02:25:09,975 INFO L913 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] [2022-03-19 02:25:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2022-03-19 02:25:17,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 7119. [2022-03-19 02:25:17,352 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) [2022-03-19 02:25:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7119 states to 7119 states and 8936 transitions. [2022-03-19 02:25:17,361 INFO L78 Accepts]: Start accepts. Automaton has 7119 states and 8936 transitions. Word has length 102 [2022-03-19 02:25:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:17,361 INFO L478 AbstractCegarLoop]: Abstraction has 7119 states and 8936 transitions. [2022-03-19 02:25:17,361 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) [2022-03-19 02:25:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7119 states and 8936 transitions. [2022-03-19 02:25:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:25:17,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:17,370 INFO L500 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] [2022-03-19 02:25:17,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 02:25:17,576 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 [2022-03-19 02:25:17,577 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 19 times [2022-03-19 02:25:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:17,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282032439] [2022-03-19 02:25:17,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:17,578 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:17,578 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 20 times [2022-03-19 02:25:17,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:17,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919105026] [2022-03-19 02:25:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:17,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-03-19 02:25:18,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919105026] [2022-03-19 02:25:18,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919105026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530367472] [2022-03-19 02:25:18,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:25:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:18,263 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) [2022-03-19 02:25:18,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 02:25:18,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:25:18,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:18,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 02:25:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:19,273 INFO L356 Elim1Store]: treesize reduction 68, result has 48.9 percent of original size [2022-03-19 02:25:19,273 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 [2022-03-19 02:25:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-19 02:25:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:22,654 INFO L356 Elim1Store]: treesize reduction 147, result has 69.6 percent of original size [2022-03-19 02:25:22,655 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 [2022-03-19 02:27:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 02:27:13,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530367472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:13,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:13,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 16] total 41 [2022-03-19 02:27:13,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282032439] [2022-03-19 02:27:13,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282032439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:13,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:13,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:27:13,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467134816] [2022-03-19 02:27:13,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:13,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:27:13,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:27:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 02:27:13,481 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) [2022-03-19 02:27:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:21,981 INFO L93 Difference]: Finished difference Result 9390 states and 11728 transitions. [2022-03-19 02:27:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:27:21,982 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 [2022-03-19 02:27:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:21,993 INFO L225 Difference]: With dead ends: 9390 [2022-03-19 02:27:21,993 INFO L226 Difference]: Without dead ends: 7708 [2022-03-19 02:27:21,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 02:27:21,999 INFO L912 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 [2022-03-19 02:27:22,000 INFO L913 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] [2022-03-19 02:27:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2022-03-19 02:27:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7623. [2022-03-19 02:27:29,816 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) [2022-03-19 02:27:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7623 states to 7623 states and 9509 transitions. [2022-03-19 02:27:29,826 INFO L78 Accepts]: Start accepts. Automaton has 7623 states and 9509 transitions. Word has length 102 [2022-03-19 02:27:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:29,826 INFO L478 AbstractCegarLoop]: Abstraction has 7623 states and 9509 transitions. [2022-03-19 02:27:29,826 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) [2022-03-19 02:27:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 7623 states and 9509 transitions. [2022-03-19 02:27:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:27:29,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:29,835 INFO L500 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] [2022-03-19 02:27:29,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 02:27:30,052 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 [2022-03-19 02:27:30,053 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1367385464, now seen corresponding path program 21 times [2022-03-19 02:27:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142847494] [2022-03-19 02:27:30,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:30,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:30,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:30,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1367385464, now seen corresponding path program 22 times [2022-03-19 02:27:30,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:30,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951284114] [2022-03-19 02:27:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:30,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-19 02:27:30,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951284114] [2022-03-19 02:27:30,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951284114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140960643] [2022-03-19 02:27:30,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:27:30,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:30,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:30,585 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) [2022-03-19 02:27:30,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 02:27:30,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:27:30,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 02:27:30,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:30,920 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 [2022-03-19 02:27:30,950 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 23 treesize of output 23 [2022-03-19 02:27:30,991 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 23 treesize of output 23 [2022-03-19 02:27:31,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:27:31,057 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 [2022-03-19 02:27:31,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:27:31,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:27:31,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:27:31,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:27:31,140 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 23 treesize of output 23 [2022-03-19 02:27:31,155 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 [2022-03-19 02:27:31,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:27:31,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-03-19 02:27:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:27:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:32,444 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 [2022-03-19 02:27:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-19 02:27:32,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140960643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:32,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:32,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 41 [2022-03-19 02:27:32,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:32,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142847494] [2022-03-19 02:27:32,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142847494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:32,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:32,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:27:32,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102335903] [2022-03-19 02:27:32,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:32,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:27:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:27:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1398, Unknown=1, NotChecked=76, Total=1640 [2022-03-19 02:27:32,568 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) [2022-03-19 02:27:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:40,887 INFO L93 Difference]: Finished difference Result 10852 states and 13447 transitions. [2022-03-19 02:27:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:27:40,888 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 [2022-03-19 02:27:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:40,924 INFO L225 Difference]: With dead ends: 10852 [2022-03-19 02:27:40,924 INFO L226 Difference]: Without dead ends: 7014 [2022-03-19 02:27:40,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=2394, Unknown=1, NotChecked=100, Total=2756 [2022-03-19 02:27:40,930 INFO L912 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 [2022-03-19 02:27:40,930 INFO L913 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] [2022-03-19 02:27:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2022-03-19 02:27:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6463. [2022-03-19 02:27:47,640 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) [2022-03-19 02:27:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 8011 transitions. [2022-03-19 02:27:47,648 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 8011 transitions. Word has length 102 [2022-03-19 02:27:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:47,649 INFO L478 AbstractCegarLoop]: Abstraction has 6463 states and 8011 transitions. [2022-03-19 02:27:47,649 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) [2022-03-19 02:27:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 8011 transitions. [2022-03-19 02:27:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:27:47,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:47,656 INFO L500 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] [2022-03-19 02:27:47,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 02:27:47,871 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 [2022-03-19 02:27:47,872 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash -67154106, now seen corresponding path program 23 times [2022-03-19 02:27:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:47,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973578970] [2022-03-19 02:27:47,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:47,873 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:47,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash -67154106, now seen corresponding path program 24 times [2022-03-19 02:27:47,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:47,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685901184] [2022-03-19 02:27:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:47,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 02:27:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685901184] [2022-03-19 02:27:50,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685901184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439956154] [2022-03-19 02:27:50,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:27:50,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:50,092 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) [2022-03-19 02:27:50,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 02:27:51,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:27:51,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 02:27:51,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:28:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:28:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:28:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:28:08,055 INFO L356 Elim1Store]: treesize reduction 162, result has 31.9 percent of original size [2022-03-19 02:28:08,055 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 [2022-03-19 02:28:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 121 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-19 02:28:08,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:19,683 INFO L356 Elim1Store]: treesize reduction 190, result has 58.6 percent of original size [2022-03-19 02:28:19,684 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 [2022-03-19 02:28:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 02:28:23,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439956154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:23,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 30] total 83 [2022-03-19 02:28:23,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:23,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973578970] [2022-03-19 02:28:23,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973578970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:23,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:23,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 02:28:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702908340] [2022-03-19 02:28:23,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:23,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 02:28:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 02:28:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=5982, Unknown=5, NotChecked=0, Total=6806 [2022-03-19 02:28:23,255 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) [2022-03-19 02:28:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:35,514 INFO L93 Difference]: Finished difference Result 9134 states and 11321 transitions. [2022-03-19 02:28:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 02:28:35,514 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 [2022-03-19 02:28:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:35,550 INFO L225 Difference]: With dead ends: 9134 [2022-03-19 02:28:35,551 INFO L226 Difference]: Without dead ends: 8959 [2022-03-19 02:28:35,555 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1412, Invalid=11015, Unknown=5, NotChecked=0, Total=12432 [2022-03-19 02:28:35,555 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 288 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:35,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 121 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:28:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2022-03-19 02:28:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 6481. [2022-03-19 02:28:42,141 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) [2022-03-19 02:28:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 8033 transitions. [2022-03-19 02:28:42,149 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 8033 transitions. Word has length 102 [2022-03-19 02:28:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:42,149 INFO L478 AbstractCegarLoop]: Abstraction has 6481 states and 8033 transitions. [2022-03-19 02:28:42,149 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) [2022-03-19 02:28:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 8033 transitions. [2022-03-19 02:28:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:28:42,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:42,156 INFO L500 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] [2022-03-19 02:28:42,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 02:28:42,363 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 [2022-03-19 02:28:42,363 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:42,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash -460181116, now seen corresponding path program 25 times [2022-03-19 02:28:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:42,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017638559] [2022-03-19 02:28:42,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:42,365 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:42,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:42,365 INFO L85 PathProgramCache]: Analyzing trace with hash -460181116, now seen corresponding path program 26 times [2022-03-19 02:28:42,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:42,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690341644] [2022-03-19 02:28:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-19 02:28:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690341644] [2022-03-19 02:28:42,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690341644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921185490] [2022-03-19 02:28:42,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:28:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:42,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:42,822 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) [2022-03-19 02:28:42,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 02:28:43,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:28:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 02:28:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:43,096 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 [2022-03-19 02:28:43,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,226 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 [2022-03-19 02:28:43,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,281 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 23 treesize of output 23 [2022-03-19 02:28:43,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:43,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:28:44,109 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:28:44,109 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 [2022-03-19 02:28:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 02:28:44,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:58,555 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 [2022-03-19 02:28:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-19 02:28:58,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921185490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:58,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:58,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 18] total 43 [2022-03-19 02:28:58,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017638559] [2022-03-19 02:28:58,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017638559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:58,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:58,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:28:58,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158585150] [2022-03-19 02:28:58,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:58,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:28:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:28:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1453, Unknown=10, NotChecked=80, Total=1806 [2022-03-19 02:28:58,695 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) [2022-03-19 02:29:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:05,736 INFO L93 Difference]: Finished difference Result 9325 states and 11523 transitions. [2022-03-19 02:29:05,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:29:05,736 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 [2022-03-19 02:29:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:05,761 INFO L225 Difference]: With dead ends: 9325 [2022-03-19 02:29:05,761 INFO L226 Difference]: Without dead ends: 6153 [2022-03-19 02:29:05,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=337, Invalid=2309, Unknown=10, NotChecked=100, Total=2756 [2022-03-19 02:29:05,766 INFO L912 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:05,767 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 65 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:29:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-03-19 02:29:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 6068. [2022-03-19 02:29:12,136 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) [2022-03-19 02:29:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 7477 transitions. [2022-03-19 02:29:12,143 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 7477 transitions. Word has length 102 [2022-03-19 02:29:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:12,143 INFO L478 AbstractCegarLoop]: Abstraction has 6068 states and 7477 transitions. [2022-03-19 02:29:12,143 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) [2022-03-19 02:29:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 7477 transitions. [2022-03-19 02:29:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:29:12,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:12,150 INFO L500 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] [2022-03-19 02:29:12,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 02:29:12,367 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 [2022-03-19 02:29:12,367 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1297013632, now seen corresponding path program 27 times [2022-03-19 02:29:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:12,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961095125] [2022-03-19 02:29:12,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:12,368 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:12,368 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:12,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1297013632, now seen corresponding path program 28 times [2022-03-19 02:29:12,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:12,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393570997] [2022-03-19 02:29:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:12,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:12,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:29:12,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393570997] [2022-03-19 02:29:12,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393570997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021114738] [2022-03-19 02:29:12,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:29:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:12,916 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) [2022-03-19 02:29:12,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 02:29:13,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:29:13,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 02:29:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:13,216 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 [2022-03-19 02:29:13,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,290 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 23 treesize of output 23 [2022-03-19 02:29:13,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,386 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 23 treesize of output 23 [2022-03-19 02:29:13,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:29:13,485 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 [2022-03-19 02:29:14,276 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:29:14,277 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 [2022-03-19 02:29:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 46 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-03-19 02:29:14,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:15,804 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 [2022-03-19 02:29:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-19 02:29:16,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021114738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:16,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:16,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-03-19 02:29:16,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:16,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961095125] [2022-03-19 02:29:16,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961095125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:16,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:16,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:29:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210109620] [2022-03-19 02:29:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:16,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:29:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:29:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1254, Unknown=1, NotChecked=72, Total=1482 [2022-03-19 02:29:16,149 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) [2022-03-19 02:29:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:22,895 INFO L93 Difference]: Finished difference Result 8233 states and 10105 transitions. [2022-03-19 02:29:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:29:22,904 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 [2022-03-19 02:29:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:22,910 INFO L225 Difference]: With dead ends: 8233 [2022-03-19 02:29:22,910 INFO L226 Difference]: Without dead ends: 5621 [2022-03-19 02:29:22,914 INFO L911 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 [2022-03-19 02:29:22,914 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 172 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:22,914 INFO L913 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] [2022-03-19 02:29:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2022-03-19 02:29:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5480. [2022-03-19 02:29:28,668 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) [2022-03-19 02:29:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 6744 transitions. [2022-03-19 02:29:28,673 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 6744 transitions. Word has length 102 [2022-03-19 02:29:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:28,673 INFO L478 AbstractCegarLoop]: Abstraction has 5480 states and 6744 transitions. [2022-03-19 02:29:28,673 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) [2022-03-19 02:29:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 6744 transitions. [2022-03-19 02:29:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:29:28,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:28,679 INFO L500 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] [2022-03-19 02:29:28,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:28,896 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 [2022-03-19 02:29:28,896 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash -407448828, now seen corresponding path program 29 times [2022-03-19 02:29:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:28,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008771366] [2022-03-19 02:29:28,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:28,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:28,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash -407448828, now seen corresponding path program 30 times [2022-03-19 02:29:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820280101] [2022-03-19 02:29:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:30,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 02:29:30,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:30,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820280101] [2022-03-19 02:29:30,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820280101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:30,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230040167] [2022-03-19 02:29:30,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:29:30,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:30,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:30,005 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) [2022-03-19 02:29:30,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 02:29:31,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:29:31,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 02:29:31,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:31,868 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 [2022-03-19 02:29:32,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:29:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:29:32,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:29:32,750 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:29:32,750 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 [2022-03-19 02:29:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 86 proven. 103 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-19 02:29:32,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-03-19 02:29:35,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230040167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:35,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:35,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 23] total 63 [2022-03-19 02:29:35,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008771366] [2022-03-19 02:29:35,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008771366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:35,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:35,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:29:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138660230] [2022-03-19 02:29:35,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:35,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:29:35,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:29:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=3306, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 02:29:35,154 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) [2022-03-19 02:29:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:42,938 INFO L93 Difference]: Finished difference Result 7561 states and 9199 transitions. [2022-03-19 02:29:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:29:42,938 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 [2022-03-19 02:29:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:42,945 INFO L225 Difference]: With dead ends: 7561 [2022-03-19 02:29:42,945 INFO L226 Difference]: Without dead ends: 6118 [2022-03-19 02:29:42,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=840, Invalid=5012, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 02:29:42,947 INFO L912 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 [2022-03-19 02:29:42,948 INFO L913 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] [2022-03-19 02:29:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2022-03-19 02:29:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 5136. [2022-03-19 02:29:48,458 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) [2022-03-19 02:29:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 6221 transitions. [2022-03-19 02:29:48,464 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 6221 transitions. Word has length 102 [2022-03-19 02:29:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:48,464 INFO L478 AbstractCegarLoop]: Abstraction has 5136 states and 6221 transitions. [2022-03-19 02:29:48,464 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) [2022-03-19 02:29:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 6221 transitions. [2022-03-19 02:29:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:29:48,470 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:48,470 INFO L500 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] [2022-03-19 02:29:48,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:48,676 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 [2022-03-19 02:29:48,676 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 31 times [2022-03-19 02:29:48,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:48,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248101038] [2022-03-19 02:29:48,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:48,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:48,678 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 32 times [2022-03-19 02:29:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:48,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116265869] [2022-03-19 02:29:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:48,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:50,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 183 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-19 02:29:50,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:50,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116265869] [2022-03-19 02:29:50,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116265869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:50,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821022695] [2022-03-19 02:29:50,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:29:50,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:50,716 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) [2022-03-19 02:29:50,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 02:29:51,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:29:51,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 02:29:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:51,063 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 [2022-03-19 02:29:51,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 02:29:51,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,369 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 25 treesize of output 25 [2022-03-19 02:29:51,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:51,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2022-03-19 02:29:52,444 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:29:52,445 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 [2022-03-19 02:29:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 02:29:52,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:30:07,646 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 [2022-03-19 02:30:08,051 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 [2022-03-19 02:30:08,069 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 [2022-03-19 02:30:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 11 refuted. 0 times theorem prover too weak. 196 trivial. 44 not checked. [2022-03-19 02:30:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821022695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:30:08,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:30:08,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 21] total 63 [2022-03-19 02:30:08,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:30:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248101038] [2022-03-19 02:30:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248101038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:30:08,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:30:08,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 02:30:08,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540751237] [2022-03-19 02:30:08,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:30:08,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 02:30:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 02:30:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3152, Unknown=32, NotChecked=354, Total=3906 [2022-03-19 02:30:08,095 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) [2022-03-19 02:30:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:30:17,752 INFO L93 Difference]: Finished difference Result 6315 states and 7710 transitions. [2022-03-19 02:30:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 02:30:17,753 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 [2022-03-19 02:30:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:30:17,762 INFO L225 Difference]: With dead ends: 6315 [2022-03-19 02:30:17,762 INFO L226 Difference]: Without dead ends: 6125 [2022-03-19 02:30:17,764 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=760, Invalid=6876, Unknown=32, NotChecked=522, Total=8190 [2022-03-19 02:30:17,764 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 290 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:30:17,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 111 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:30:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2022-03-19 02:30:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 5598. [2022-03-19 02:30:23,928 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) [2022-03-19 02:30:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 6775 transitions. [2022-03-19 02:30:23,934 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 6775 transitions. Word has length 102 [2022-03-19 02:30:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:30:23,935 INFO L478 AbstractCegarLoop]: Abstraction has 5598 states and 6775 transitions. [2022-03-19 02:30:23,935 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) [2022-03-19 02:30:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 6775 transitions. [2022-03-19 02:30:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:30:23,940 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:30:23,941 INFO L500 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] [2022-03-19 02:30:23,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 02:30:24,155 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 [2022-03-19 02:30:24,156 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:30:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:30:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 33 times [2022-03-19 02:30:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38989452] [2022-03-19 02:30:24,157 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:30:24,157 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:30:24,157 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:30:24,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 34 times [2022-03-19 02:30:24,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:30:24,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426628330] [2022-03-19 02:30:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:30:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:30:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:25,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:30:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 02:30:25,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:30:25,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426628330] [2022-03-19 02:30:25,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426628330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:30:25,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105968526] [2022-03-19 02:30:25,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:30:25,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:30:25,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:30:25,546 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) [2022-03-19 02:30:25,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 02:30:25,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:30:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:30:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 02:30:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:30:25,856 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 [2022-03-19 02:30:25,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:25,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:25,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:25,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:26,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:26,050 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 [2022-03-19 02:30:26,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:26,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:26,120 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 [2022-03-19 02:30:26,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:26,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:30:27,025 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 [2022-03-19 02:30:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 46 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:30:27,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:30:27,831 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 [2022-03-19 02:30:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 54 proven. 4 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-03-19 02:30:27,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105968526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:30:27,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:30:27,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 14] total 42 [2022-03-19 02:30:27,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:30:27,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38989452] [2022-03-19 02:30:27,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38989452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:30:27,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:30:27,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:30:27,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145649215] [2022-03-19 02:30:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:30:27,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:30:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:27,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:30:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1408, Unknown=1, NotChecked=78, Total=1722 [2022-03-19 02:30:27,963 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) [2022-03-19 02:30:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:30:35,556 INFO L93 Difference]: Finished difference Result 6653 states and 8036 transitions. [2022-03-19 02:30:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:30:35,556 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 [2022-03-19 02:30:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:30:35,563 INFO L225 Difference]: With dead ends: 6653 [2022-03-19 02:30:35,563 INFO L226 Difference]: Without dead ends: 6318 [2022-03-19 02:30:35,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=399, Invalid=2796, Unknown=1, NotChecked=110, Total=3306 [2022-03-19 02:30:35,565 INFO L912 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 [2022-03-19 02:30:35,565 INFO L913 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] [2022-03-19 02:30:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2022-03-19 02:30:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5574. [2022-03-19 02:30:41,673 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) [2022-03-19 02:30:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 6735 transitions. [2022-03-19 02:30:41,679 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 6735 transitions. Word has length 102 [2022-03-19 02:30:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:30:41,680 INFO L478 AbstractCegarLoop]: Abstraction has 5574 states and 6735 transitions. [2022-03-19 02:30:41,680 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) [2022-03-19 02:30:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 6735 transitions. [2022-03-19 02:30:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:30:41,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:30:41,685 INFO L500 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] [2022-03-19 02:30:41,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 02:30:41,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 02:30:41,904 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:30:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:30:41,904 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 35 times [2022-03-19 02:30:41,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:41,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185303024] [2022-03-19 02:30:41,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:30:41,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:30:41,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:30:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 36 times [2022-03-19 02:30:41,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:30:41,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069657983] [2022-03-19 02:30:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:30:41,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:30:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:42,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:30:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 02:30:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:30:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069657983] [2022-03-19 02:30:42,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069657983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:30:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576063711] [2022-03-19 02:30:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:30:42,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:30:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:30:42,557 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) [2022-03-19 02:30:42,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 02:30:43,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:30:43,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:30:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 02:30:43,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:30:44,411 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:30:44,411 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 [2022-03-19 02:30:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 60 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 02:30:44,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:30:45,750 INFO L356 Elim1Store]: treesize reduction 116, result has 65.0 percent of original size [2022-03-19 02:30:45,751 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 [2022-03-19 02:30:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 02:30:46,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576063711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:30:46,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:30:46,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 43 [2022-03-19 02:30:46,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:30:46,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185303024] [2022-03-19 02:30:46,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185303024] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:30:46,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:30:46,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:30:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506041927] [2022-03-19 02:30:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:30:46,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:30:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:30:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:30:46,353 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) [2022-03-19 02:30:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:30:53,748 INFO L93 Difference]: Finished difference Result 8030 states and 9694 transitions. [2022-03-19 02:30:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:30:53,748 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 [2022-03-19 02:30:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:30:53,755 INFO L225 Difference]: With dead ends: 8030 [2022-03-19 02:30:53,755 INFO L226 Difference]: Without dead ends: 6148 [2022-03-19 02:30:53,758 INFO L911 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 [2022-03-19 02:30:53,759 INFO L912 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 [2022-03-19 02:30:53,759 INFO L913 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] [2022-03-19 02:30:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2022-03-19 02:31:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 6078. [2022-03-19 02:31:00,362 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) [2022-03-19 02:31:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 7286 transitions. [2022-03-19 02:31:00,373 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 7286 transitions. Word has length 102 [2022-03-19 02:31:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:00,373 INFO L478 AbstractCegarLoop]: Abstraction has 6078 states and 7286 transitions. [2022-03-19 02:31:00,373 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) [2022-03-19 02:31:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 7286 transitions. [2022-03-19 02:31:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:31:00,377 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:00,378 INFO L500 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] [2022-03-19 02:31:00,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 02:31:00,583 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 [2022-03-19 02:31:00,583 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 37 times [2022-03-19 02:31:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:00,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1334032224] [2022-03-19 02:31:00,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:00,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:00,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 38 times [2022-03-19 02:31:00,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:00,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140910024] [2022-03-19 02:31:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:00,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:01,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-19 02:31:01,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:01,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140910024] [2022-03-19 02:31:01,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140910024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:01,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781902897] [2022-03-19 02:31:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:31:01,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:01,126 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) [2022-03-19 02:31:01,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 02:31:01,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:31:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 02:31:01,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:01,374 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 [2022-03-19 02:31:01,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:01,707 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 [2022-03-19 02:31:01,742 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 [2022-03-19 02:31:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:31:02,786 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 [2022-03-19 02:31:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-19 02:31:02,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:03,982 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 [2022-03-19 02:31:04,060 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 [2022-03-19 02:31:04,067 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 [2022-03-19 02:31:04,080 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 [2022-03-19 02:31:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 9 refuted. 0 times theorem prover too weak. 198 trivial. 44 not checked. [2022-03-19 02:31:04,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781902897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:04,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:04,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 47 [2022-03-19 02:31:04,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1334032224] [2022-03-19 02:31:04,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1334032224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:04,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:04,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:31:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442875241] [2022-03-19 02:31:04,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:04,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:31:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:31:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1583, Unknown=4, NotChecked=340, Total=2162 [2022-03-19 02:31:04,102 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) [2022-03-19 02:31:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:10,966 INFO L93 Difference]: Finished difference Result 8650 states and 10374 transitions. [2022-03-19 02:31:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:31:10,967 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 [2022-03-19 02:31:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:10,973 INFO L225 Difference]: With dead ends: 8650 [2022-03-19 02:31:10,973 INFO L226 Difference]: Without dead ends: 5459 [2022-03-19 02:31:10,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=2658, Unknown=4, NotChecked=436, Total=3422 [2022-03-19 02:31:10,977 INFO L912 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 [2022-03-19 02:31:10,977 INFO L913 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] [2022-03-19 02:31:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-03-19 02:31:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5373. [2022-03-19 02:31:16,763 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) [2022-03-19 02:31:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 6429 transitions. [2022-03-19 02:31:16,768 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 6429 transitions. Word has length 102 [2022-03-19 02:31:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:16,768 INFO L478 AbstractCegarLoop]: Abstraction has 5373 states and 6429 transitions. [2022-03-19 02:31:16,768 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) [2022-03-19 02:31:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 6429 transitions. [2022-03-19 02:31:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:31:16,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:16,773 INFO L500 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] [2022-03-19 02:31:16,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 02:31:16,990 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 [2022-03-19 02:31:16,991 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 39 times [2022-03-19 02:31:16,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:16,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594355148] [2022-03-19 02:31:16,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:16,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:16,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:16,992 INFO L85 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 40 times [2022-03-19 02:31:16,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:16,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840026875] [2022-03-19 02:31:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:16,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 214 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-19 02:31:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:18,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840026875] [2022-03-19 02:31:18,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840026875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078017392] [2022-03-19 02:31:18,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:31:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:18,955 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) [2022-03-19 02:31:18,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 02:31:19,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:31:19,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:19,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 02:31:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:19,344 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 [2022-03-19 02:31:19,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,532 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 [2022-03-19 02:31:19,550 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 [2022-03-19 02:31:19,569 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 [2022-03-19 02:31:19,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:19,636 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 [2022-03-19 02:31:20,589 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:31:20,589 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 [2022-03-19 02:31:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 93 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-19 02:31:20,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:22,253 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 [2022-03-19 02:31:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 106 proven. 14 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-19 02:31:22,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078017392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:22,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:22,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 17] total 55 [2022-03-19 02:31:22,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:22,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594355148] [2022-03-19 02:31:22,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594355148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:22,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:22,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 02:31:22,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333218704] [2022-03-19 02:31:22,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:22,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 02:31:22,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 02:31:22,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2585, Unknown=1, NotChecked=104, Total=2970 [2022-03-19 02:31:22,531 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) [2022-03-19 02:31:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:33,043 INFO L93 Difference]: Finished difference Result 8065 states and 9648 transitions. [2022-03-19 02:31:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 02:31:33,043 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 [2022-03-19 02:31:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:33,056 INFO L225 Difference]: With dead ends: 8065 [2022-03-19 02:31:33,056 INFO L226 Difference]: Without dead ends: 7890 [2022-03-19 02:31:33,057 INFO L911 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 [2022-03-19 02:31:33,059 INFO L912 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 [2022-03-19 02:31:33,059 INFO L913 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] [2022-03-19 02:31:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2022-03-19 02:31:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 6012. [2022-03-19 02:31:39,680 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) [2022-03-19 02:31:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7207 transitions. [2022-03-19 02:31:39,685 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7207 transitions. Word has length 102 [2022-03-19 02:31:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:39,686 INFO L478 AbstractCegarLoop]: Abstraction has 6012 states and 7207 transitions. [2022-03-19 02:31:39,686 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) [2022-03-19 02:31:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7207 transitions. [2022-03-19 02:31:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:31:39,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:39,690 INFO L500 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] [2022-03-19 02:31:39,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 02:31:39,899 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 [2022-03-19 02:31:39,899 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 41 times [2022-03-19 02:31:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1736272724] [2022-03-19 02:31:39,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:39,901 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:39,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 42 times [2022-03-19 02:31:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:39,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630420549] [2022-03-19 02:31:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:40,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:31:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630420549] [2022-03-19 02:31:40,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630420549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028800876] [2022-03-19 02:31:40,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:31:40,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:40,424 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) [2022-03-19 02:31:40,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 02:31:41,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 02:31:41,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 02:31:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:41,323 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 [2022-03-19 02:31:41,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,546 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 [2022-03-19 02:31:41,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:41,594 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 [2022-03-19 02:31:41,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:42,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:31:42,007 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 [2022-03-19 02:31:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-19 02:31:42,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:42,859 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 [2022-03-19 02:31:42,964 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 [2022-03-19 02:31:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 294 trivial. 10 not checked. [2022-03-19 02:31:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028800876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:42,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 14] total 37 [2022-03-19 02:31:42,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1736272724] [2022-03-19 02:31:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1736272724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:42,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:31:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388835789] [2022-03-19 02:31:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:42,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:31:42,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:31:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1043, Unknown=2, NotChecked=134, Total=1332 [2022-03-19 02:31:42,981 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) [2022-03-19 02:31:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:49,876 INFO L93 Difference]: Finished difference Result 8590 states and 10300 transitions. [2022-03-19 02:31:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:31:49,876 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 [2022-03-19 02:31:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:49,882 INFO L225 Difference]: With dead ends: 8590 [2022-03-19 02:31:49,882 INFO L226 Difference]: Without dead ends: 5504 [2022-03-19 02:31:49,886 INFO L911 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 [2022-03-19 02:31:49,887 INFO L912 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 [2022-03-19 02:31:49,887 INFO L913 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] [2022-03-19 02:31:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2022-03-19 02:31:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 5402. [2022-03-19 02:31:55,943 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) [2022-03-19 02:31:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 6450 transitions. [2022-03-19 02:31:55,948 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 6450 transitions. Word has length 102 [2022-03-19 02:31:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:55,949 INFO L478 AbstractCegarLoop]: Abstraction has 5402 states and 6450 transitions. [2022-03-19 02:31:55,949 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) [2022-03-19 02:31:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 6450 transitions. [2022-03-19 02:31:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:31:55,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:55,954 INFO L500 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] [2022-03-19 02:31:55,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 02:31:56,160 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 [2022-03-19 02:31:56,161 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:56,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 43 times [2022-03-19 02:31:56,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:56,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206616779] [2022-03-19 02:31:56,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:56,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:56,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 44 times [2022-03-19 02:31:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333616663] [2022-03-19 02:31:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:56,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 02:31:56,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333616663] [2022-03-19 02:31:56,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333616663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430454200] [2022-03-19 02:31:56,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:31:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:56,808 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) [2022-03-19 02:31:56,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 02:31:57,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:31:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 02:31:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:57,155 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 [2022-03-19 02:31:57,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,267 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 [2022-03-19 02:31:57,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:57,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:31:58,019 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:31:58,019 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 [2022-03-19 02:31:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 02:31:58,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:32:13,427 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 [2022-03-19 02:32:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-19 02:32:13,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430454200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:32:13,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:32:13,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 41 [2022-03-19 02:32:13,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:32:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206616779] [2022-03-19 02:32:13,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206616779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:32:13,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:32:13,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:32:13,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073197193] [2022-03-19 02:32:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:32:13,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:32:13,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:32:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:32:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1347, Unknown=8, NotChecked=76, Total=1640 [2022-03-19 02:32:13,558 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) [2022-03-19 02:32:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:32:21,018 INFO L93 Difference]: Finished difference Result 5700 states and 6819 transitions. [2022-03-19 02:32:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:32:21,019 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 [2022-03-19 02:32:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:32:21,024 INFO L225 Difference]: With dead ends: 5700 [2022-03-19 02:32:21,024 INFO L226 Difference]: Without dead ends: 5547 [2022-03-19 02:32:21,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=298, Invalid=2454, Unknown=8, NotChecked=102, Total=2862 [2022-03-19 02:32:21,025 INFO L912 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 [2022-03-19 02:32:21,025 INFO L913 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] [2022-03-19 02:32:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2022-03-19 02:32:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 5492. [2022-03-19 02:32:27,242 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) [2022-03-19 02:32:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 6555 transitions. [2022-03-19 02:32:27,248 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 6555 transitions. Word has length 102 [2022-03-19 02:32:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:32:27,248 INFO L478 AbstractCegarLoop]: Abstraction has 5492 states and 6555 transitions. [2022-03-19 02:32:27,248 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) [2022-03-19 02:32:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 6555 transitions. [2022-03-19 02:32:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:32:27,252 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:32:27,253 INFO L500 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] [2022-03-19 02:32:27,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 02:32:27,464 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 [2022-03-19 02:32:27,465 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:32:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:32:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 45 times [2022-03-19 02:32:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:32:27,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1771856703] [2022-03-19 02:32:27,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:32:27,466 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:32:27,466 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:32:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 46 times [2022-03-19 02:32:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:32:27,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044281594] [2022-03-19 02:32:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:32:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:32:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:32:29,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:32:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:32:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-03-19 02:32:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:32:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044281594] [2022-03-19 02:32:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044281594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:32:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501727216] [2022-03-19 02:32:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:32:29,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:32:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:32:29,023 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) [2022-03-19 02:32:29,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 02:32:29,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:32:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:32:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 02:32:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:32:29,320 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 [2022-03-19 02:32:29,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,417 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 [2022-03-19 02:32:29,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:29,600 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 23 treesize of output 23 [2022-03-19 02:32:29,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:32:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 02:32:30,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:32:31,195 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 [2022-03-19 02:32:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-03-19 02:32:31,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501727216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:32:31,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:32:31,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 15] total 51 [2022-03-19 02:32:31,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:32:31,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1771856703] [2022-03-19 02:32:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1771856703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:32:31,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:32:31,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 02:32:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901651583] [2022-03-19 02:32:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:32:31,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 02:32:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:32:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 02:32:31,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2158, Unknown=1, NotChecked=96, Total=2550 [2022-03-19 02:32:31,273 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) [2022-03-19 02:32:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:32:40,292 INFO L93 Difference]: Finished difference Result 7060 states and 8472 transitions. [2022-03-19 02:32:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 02:32:40,293 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 [2022-03-19 02:32:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:32:40,299 INFO L225 Difference]: With dead ends: 7060 [2022-03-19 02:32:40,299 INFO L226 Difference]: Without dead ends: 6116 [2022-03-19 02:32:40,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=665, Invalid=5190, Unknown=1, NotChecked=150, Total=6006 [2022-03-19 02:32:40,301 INFO L912 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 [2022-03-19 02:32:40,301 INFO L913 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] [2022-03-19 02:32:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-03-19 02:32:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5424. [2022-03-19 02:32:46,404 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) [2022-03-19 02:32:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6462 transitions. [2022-03-19 02:32:46,409 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6462 transitions. Word has length 102 [2022-03-19 02:32:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:32:46,409 INFO L478 AbstractCegarLoop]: Abstraction has 5424 states and 6462 transitions. [2022-03-19 02:32:46,409 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) [2022-03-19 02:32:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6462 transitions. [2022-03-19 02:32:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:32:46,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:32:46,413 INFO L500 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] [2022-03-19 02:32:46,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 02:32:46,630 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 [2022-03-19 02:32:46,631 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:32:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:32:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 47 times [2022-03-19 02:32:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:32:46,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575097437] [2022-03-19 02:32:46,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:32:46,632 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:32:46,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:32:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 48 times [2022-03-19 02:32:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:32:46,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501274213] [2022-03-19 02:32:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:32:46,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:32:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:32:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:32:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:32:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-19 02:32:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:32:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501274213] [2022-03-19 02:32:47,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501274213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:32:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060882518] [2022-03-19 02:32:47,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:32:47,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:32:47,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:32:47,305 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) [2022-03-19 02:32:47,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 02:32:48,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:32:48,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:32:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 02:32:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:32:48,766 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-03-19 02:32:48,767 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 [2022-03-19 02:32:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 60 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 02:32:48,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:32:50,023 INFO L356 Elim1Store]: treesize reduction 116, result has 65.0 percent of original size [2022-03-19 02:32:50,023 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 [2022-03-19 02:32:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 02:32:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060882518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:32:50,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:32:50,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16] total 42 [2022-03-19 02:32:50,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:32:50,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575097437] [2022-03-19 02:32:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575097437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:32:50,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:32:50,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:32:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778271610] [2022-03-19 02:32:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:32:50,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:32:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:32:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:32:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 02:32:50,735 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) [2022-03-19 02:32:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:32:58,074 INFO L93 Difference]: Finished difference Result 7481 states and 8920 transitions. [2022-03-19 02:32:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:32:58,075 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 [2022-03-19 02:32:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:32:58,081 INFO L225 Difference]: With dead ends: 7481 [2022-03-19 02:32:58,081 INFO L226 Difference]: Without dead ends: 5660 [2022-03-19 02:32:58,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 02:32:58,084 INFO L912 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 [2022-03-19 02:32:58,084 INFO L913 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] [2022-03-19 02:32:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5660 states. [2022-03-19 02:33:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5660 to 5499. [2022-03-19 02:33:04,501 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) [2022-03-19 02:33:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6531 transitions. [2022-03-19 02:33:04,507 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6531 transitions. Word has length 102 [2022-03-19 02:33:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:33:04,507 INFO L478 AbstractCegarLoop]: Abstraction has 5499 states and 6531 transitions. [2022-03-19 02:33:04,507 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) [2022-03-19 02:33:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6531 transitions. [2022-03-19 02:33:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:33:04,511 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:33:04,512 INFO L500 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] [2022-03-19 02:33:04,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 02:33:04,717 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 [2022-03-19 02:33:04,717 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:33:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:33:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 49 times [2022-03-19 02:33:04,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:04,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286330021] [2022-03-19 02:33:04,719 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:33:04,719 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:33:04,719 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:33:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 50 times [2022-03-19 02:33:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:33:04,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273943326] [2022-03-19 02:33:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:33:04,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:33:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:33:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-19 02:33:05,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:33:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273943326] [2022-03-19 02:33:05,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273943326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:33:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354389890] [2022-03-19 02:33:05,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:33:05,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:05,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:33:05,256 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) [2022-03-19 02:33:05,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 02:33:05,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:33:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:33:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 02:33:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:33:05,592 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 [2022-03-19 02:33:05,622 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 [2022-03-19 02:33:05,668 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 [2022-03-19 02:33:05,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,755 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 [2022-03-19 02:33:05,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:05,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:06,999 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:33:07,000 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 [2022-03-19 02:33:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 101 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-03-19 02:33:07,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:33:26,657 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 [2022-03-19 02:33:26,824 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 [2022-03-19 02:33:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 178 trivial. 41 not checked. [2022-03-19 02:33:27,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354389890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:33:27,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:33:27,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 25] total 56 [2022-03-19 02:33:27,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:33:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286330021] [2022-03-19 02:33:27,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286330021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:33:27,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:33:27,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:33:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552424829] [2022-03-19 02:33:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:33:27,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:33:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:33:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2414, Unknown=13, NotChecked=210, Total=3080 [2022-03-19 02:33:27,795 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) [2022-03-19 02:33:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:33:35,107 INFO L93 Difference]: Finished difference Result 8115 states and 9646 transitions. [2022-03-19 02:33:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:33:35,107 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 [2022-03-19 02:33:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:33:35,129 INFO L225 Difference]: With dead ends: 8115 [2022-03-19 02:33:35,129 INFO L226 Difference]: Without dead ends: 5176 [2022-03-19 02:33:35,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=543, Invalid=3742, Unknown=13, NotChecked=258, Total=4556 [2022-03-19 02:33:35,139 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 210 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:33:35,140 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 85 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:33:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2022-03-19 02:33:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4970. [2022-03-19 02:33:41,073 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) [2022-03-19 02:33:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-19 02:33:41,078 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-19 02:33:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:33:41,078 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-19 02:33:41,078 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) [2022-03-19 02:33:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-19 02:33:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:33:41,082 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:33:41,082 INFO L500 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] [2022-03-19 02:33:41,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 02:33:41,285 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 [2022-03-19 02:33:41,285 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:33:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:33:41,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 51 times [2022-03-19 02:33:41,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:41,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586676989] [2022-03-19 02:33:41,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:33:41,287 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:33:41,287 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:33:41,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 52 times [2022-03-19 02:33:41,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:33:41,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558978514] [2022-03-19 02:33:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:33:41,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:33:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:42,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:33:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 02:33:42,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:33:42,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558978514] [2022-03-19 02:33:42,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558978514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:33:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691185691] [2022-03-19 02:33:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:33:42,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:42,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:33:42,006 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) [2022-03-19 02:33:42,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 02:33:42,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:33:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:33:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 02:33:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:33:42,372 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 [2022-03-19 02:33:42,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,498 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 23 treesize of output 23 [2022-03-19 02:33:42,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,590 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 [2022-03-19 02:33:42,611 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 [2022-03-19 02:33:42,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:42,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:33:43,441 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:33:43,441 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 [2022-03-19 02:33:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 46 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-03-19 02:33:43,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:33:45,030 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 [2022-03-19 02:33:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-19 02:33:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691185691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:33:45,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:33:45,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2022-03-19 02:33:45,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:33:45,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586676989] [2022-03-19 02:33:45,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586676989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:33:45,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:33:45,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:33:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23301808] [2022-03-19 02:33:45,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:33:45,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:33:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:33:45,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1397, Unknown=1, NotChecked=76, Total=1640 [2022-03-19 02:33:45,280 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) [2022-03-19 02:33:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:33:52,827 INFO L93 Difference]: Finished difference Result 5272 states and 6271 transitions. [2022-03-19 02:33:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:33:52,828 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 [2022-03-19 02:33:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:33:52,833 INFO L225 Difference]: With dead ends: 5272 [2022-03-19 02:33:52,834 INFO L226 Difference]: Without dead ends: 5104 [2022-03-19 02:33:52,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=261, Invalid=2604, Unknown=1, NotChecked=104, Total=2970 [2022-03-19 02:33:52,835 INFO L912 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 [2022-03-19 02:33:52,835 INFO L913 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] [2022-03-19 02:33:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2022-03-19 02:33:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4970. [2022-03-19 02:33:58,789 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) [2022-03-19 02:33:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-19 02:33:58,794 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-19 02:33:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:33:58,794 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-19 02:33:58,795 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) [2022-03-19 02:33:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-19 02:33:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:33:58,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:33:58,800 INFO L500 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] [2022-03-19 02:33:58,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 02:33:59,015 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 [2022-03-19 02:33:59,015 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:33:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:33:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 53 times [2022-03-19 02:33:59,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:33:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1956073101] [2022-03-19 02:33:59,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:33:59,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:33:59,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:33:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 54 times [2022-03-19 02:33:59,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:33:59,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483459881] [2022-03-19 02:33:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:33:59,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:33:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:33:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:33:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 02:33:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:33:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483459881] [2022-03-19 02:33:59,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483459881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:33:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357309337] [2022-03-19 02:33:59,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:33:59,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:33:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:33:59,801 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) [2022-03-19 02:33:59,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 02:34:00,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 02:34:00,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:34:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 02:34:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:34:00,910 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 [2022-03-19 02:34:00,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:00,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,115 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 [2022-03-19 02:34:01,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:34:01,930 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 [2022-03-19 02:34:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 32 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-19 02:34:02,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:34:02,903 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 [2022-03-19 02:34:03,264 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 [2022-03-19 02:34:03,276 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 [2022-03-19 02:34:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 43 proven. 9 refuted. 0 times theorem prover too weak. 236 trivial. 54 not checked. [2022-03-19 02:34:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357309337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:34:03,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:34:03,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 21] total 50 [2022-03-19 02:34:03,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:34:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1956073101] [2022-03-19 02:34:03,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1956073101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:34:03,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:34:03,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:34:03,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728695991] [2022-03-19 02:34:03,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:34:03,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:34:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:34:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:34:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1873, Unknown=3, NotChecked=276, Total=2450 [2022-03-19 02:34:03,374 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) [2022-03-19 02:34:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:34:10,855 INFO L93 Difference]: Finished difference Result 5272 states and 6274 transitions. [2022-03-19 02:34:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:34:10,855 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 [2022-03-19 02:34:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:34:10,860 INFO L225 Difference]: With dead ends: 5272 [2022-03-19 02:34:10,860 INFO L226 Difference]: Without dead ends: 5062 [2022-03-19 02:34:10,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=389, Invalid=3160, Unknown=3, NotChecked=354, Total=3906 [2022-03-19 02:34:10,862 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 123 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:34:10,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 107 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:34:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2022-03-19 02:34:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4970. [2022-03-19 02:34:16,834 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) [2022-03-19 02:34:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-19 02:34:16,838 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-19 02:34:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:34:16,838 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-19 02:34:16,838 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) [2022-03-19 02:34:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-19 02:34:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:34:16,856 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:34:16,856 INFO L500 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] [2022-03-19 02:34:16,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 02:34:17,063 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 [2022-03-19 02:34:17,064 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:34:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:34:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 55 times [2022-03-19 02:34:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:34:17,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852601644] [2022-03-19 02:34:17,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:34:17,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:34:17,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:34:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 56 times [2022-03-19 02:34:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:34:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144234820] [2022-03-19 02:34:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:34:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:34:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:34:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:34:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:34:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 02:34:17,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:34:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144234820] [2022-03-19 02:34:17,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144234820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:34:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220729122] [2022-03-19 02:34:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:34:17,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:34:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:34:17,772 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) [2022-03-19 02:34:17,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 02:34:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:34:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:34:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 02:34:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:34:18,142 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 [2022-03-19 02:34:18,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,218 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 [2022-03-19 02:34:18,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:18,368 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 [2022-03-19 02:34:18,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:19,289 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:34:19,289 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 [2022-03-19 02:34:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 53 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-19 02:34:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:34:36,590 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 [2022-03-19 02:34:36,709 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 [2022-03-19 02:34:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 253 trivial. 10 not checked. [2022-03-19 02:34:36,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220729122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:34:36,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:34:36,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19] total 47 [2022-03-19 02:34:36,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:34:36,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852601644] [2022-03-19 02:34:36,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852601644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:34:36,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:34:36,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:34:36,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911316394] [2022-03-19 02:34:36,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:34:36,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:34:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:34:36,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:34:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1686, Unknown=12, NotChecked=174, Total=2162 [2022-03-19 02:34:36,726 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) [2022-03-19 02:34:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:34:44,198 INFO L93 Difference]: Finished difference Result 5200 states and 6188 transitions. [2022-03-19 02:34:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:34:44,199 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 [2022-03-19 02:34:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:34:44,204 INFO L225 Difference]: With dead ends: 5200 [2022-03-19 02:34:44,204 INFO L226 Difference]: Without dead ends: 5005 [2022-03-19 02:34:44,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=395, Invalid=3023, Unknown=12, NotChecked=230, Total=3660 [2022-03-19 02:34:44,205 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:34:44,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 87 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:34:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2022-03-19 02:34:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 4970. [2022-03-19 02:34:50,342 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) [2022-03-19 02:34:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4970 states to 4970 states and 5898 transitions. [2022-03-19 02:34:50,347 INFO L78 Accepts]: Start accepts. Automaton has 4970 states and 5898 transitions. Word has length 102 [2022-03-19 02:34:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:34:50,347 INFO L478 AbstractCegarLoop]: Abstraction has 4970 states and 5898 transitions. [2022-03-19 02:34:50,347 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) [2022-03-19 02:34:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4970 states and 5898 transitions. [2022-03-19 02:34:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:34:50,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:34:50,351 INFO L500 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] [2022-03-19 02:34:50,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-19 02:34:50,555 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 [2022-03-19 02:34:50,555 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:34:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:34:50,556 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 57 times [2022-03-19 02:34:50,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:34:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438875482] [2022-03-19 02:34:50,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:34:50,557 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:34:50,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:34:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 58 times [2022-03-19 02:34:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:34:50,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114136451] [2022-03-19 02:34:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:34:50,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:34:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:34:51,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:34:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:34:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 02:34:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:34:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114136451] [2022-03-19 02:34:51,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114136451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:34:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100654980] [2022-03-19 02:34:51,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:34:51,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:34:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:34:51,332 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) [2022-03-19 02:34:51,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 02:34:51,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:34:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:34:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 02:34:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:34:51,720 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 [2022-03-19 02:34:51,752 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 [2022-03-19 02:34:51,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:51,851 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 [2022-03-19 02:34:51,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:51,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:51,934 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 [2022-03-19 02:34:51,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:51,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:51,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:52,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:52,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 02:34:52,914 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-03-19 02:34:52,914 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 [2022-03-19 02:34:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 62 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-03-19 02:34:53,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:34:54,843 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 [2022-03-19 02:34:55,159 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 [2022-03-19 02:34:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 9 refuted. 0 times theorem prover too weak. 217 trivial. 42 not checked. [2022-03-19 02:34:55,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100654980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:34:55,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:34:55,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 20] total 45 [2022-03-19 02:34:55,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:34:55,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438875482] [2022-03-19 02:34:55,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438875482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:34:55,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:34:55,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:34:55,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577500224] [2022-03-19 02:34:55,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:34:55,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:34:55,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:34:55,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:34:55,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1568, Unknown=12, NotChecked=166, Total=1980 [2022-03-19 02:34:55,739 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) [2022-03-19 02:35:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:35:03,425 INFO L93 Difference]: Finished difference Result 8289 states and 9840 transitions. [2022-03-19 02:35:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:35:03,426 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 [2022-03-19 02:35:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:35:03,432 INFO L225 Difference]: With dead ends: 8289 [2022-03-19 02:35:03,432 INFO L226 Difference]: Without dead ends: 5264 [2022-03-19 02:35:03,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=304, Invalid=2554, Unknown=12, NotChecked=210, Total=3080 [2022-03-19 02:35:03,436 INFO L912 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 [2022-03-19 02:35:03,437 INFO L913 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] [2022-03-19 02:35:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2022-03-19 02:35:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 5105. [2022-03-19 02:35:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5105 states, 5100 states have (on average 1.1813725490196079) internal successors, (6025), 5100 states have internal predecessors, (6025), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:35:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5105 states to 5105 states and 6029 transitions. [2022-03-19 02:35:09,967 INFO L78 Accepts]: Start accepts. Automaton has 5105 states and 6029 transitions. Word has length 102 [2022-03-19 02:35:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:35:09,968 INFO L478 AbstractCegarLoop]: Abstraction has 5105 states and 6029 transitions. [2022-03-19 02:35:09,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:35:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5105 states and 6029 transitions. [2022-03-19 02:35:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 02:35:09,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:35:09,973 INFO L500 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] [2022-03-19 02:35:09,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 02:35:10,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:35:10,193 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:35:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:35:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 59 times [2022-03-19 02:35:10,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:35:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501390502] [2022-03-19 02:35:10,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:35:10,195 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:35:10,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:35:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 60 times [2022-03-19 02:35:10,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:35:10,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681047031] [2022-03-19 02:35:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:35:10,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:35:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:35:10,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:35:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:35:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 02:35:10,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:35:10,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681047031] [2022-03-19 02:35:10,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681047031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:35:10,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726239626] [2022-03-19 02:35:10,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:35:10,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:35:10,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:35:10,895 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:35:10,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process