/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:34:05,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:34:05,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:34:05,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:34:05,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:34:05,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:34:05,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:34:05,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:34:05,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:34:05,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:34:05,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:34:05,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:34:05,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:34:05,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:34:05,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:34:05,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:34:05,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:34:05,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:34:05,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:34:05,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:34:05,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:34:05,087 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:34:05,088 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:34:05,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:34:05,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:34:05,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:34:05,301 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:34:05,302 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:34:05,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-04-06 19:34:05,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7446ee95/8bf6c8d31bab42619e527a40b1d7906a/FLAGa5c1605d5 [2022-04-06 19:34:05,649 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:34:05,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-04-06 19:34:05,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7446ee95/8bf6c8d31bab42619e527a40b1d7906a/FLAGa5c1605d5 [2022-04-06 19:34:06,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7446ee95/8bf6c8d31bab42619e527a40b1d7906a [2022-04-06 19:34:06,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:34:06,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:34:06,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:34:06,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:34:06,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:34:06,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0a1953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06, skipping insertion in model container [2022-04-06 19:34:06,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:34:06,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:34:06,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-04-06 19:34:06,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:34:06,247 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:34:06,257 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-04-06 19:34:06,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:34:06,273 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:34:06,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06 WrapperNode [2022-04-06 19:34:06,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:34:06,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:34:06,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:34:06,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:34:06,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:34:06,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:34:06,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:34:06,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:34:06,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (1/1) ... [2022-04-06 19:34:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:34:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:06,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:34:06,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:34:06,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:34:06,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:34:06,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:34:06,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:34:06,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:34:06,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:34:06,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:34:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:34:06,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:34:06,396 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:34:06,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:34:06,503 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:34:06,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:34:06,507 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 19:34:06,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:34:06 BoogieIcfgContainer [2022-04-06 19:34:06,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:34:06,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:34:06,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:34:06,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:34:06,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:34:06" (1/3) ... [2022-04-06 19:34:06,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f171458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:34:06, skipping insertion in model container [2022-04-06 19:34:06,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:34:06" (2/3) ... [2022-04-06 19:34:06,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f171458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:34:06, skipping insertion in model container [2022-04-06 19:34:06,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:34:06" (3/3) ... [2022-04-06 19:34:06,519 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-04-06 19:34:06,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:34:06,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:34:06,579 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:34:06,583 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:34:06,584 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:34:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:34:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:34:06,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:06,626 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:06,626 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-04-06 19:34:06,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:06,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [196407010] [2022-04-06 19:34:06,646 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:34:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 2 times [2022-04-06 19:34:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:06,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923209297] [2022-04-06 19:34:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:06,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923209297] [2022-04-06 19:34:06,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923209297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:06,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:06,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:34:06,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [196407010] [2022-04-06 19:34:06,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [196407010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:06,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:06,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:34:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618022291] [2022-04-06 19:34:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:06,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:34:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:34:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:34:06,858 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:06,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:06,889 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-04-06 19:34:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:34:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 19:34:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:06,895 INFO L225 Difference]: With dead ends: 64 [2022-04-06 19:34:06,896 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 19:34:06,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:34:06,901 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:06,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:34:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 19:34:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 19:34:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-04-06 19:34:06,926 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-04-06 19:34:06,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:06,927 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-04-06 19:34:06,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-04-06 19:34:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:34:06,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:06,928 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:06,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:34:06,928 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-04-06 19:34:06,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:06,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [759457050] [2022-04-06 19:34:06,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:34:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 2 times [2022-04-06 19:34:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258306409] [2022-04-06 19:34:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:06,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:06,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:06,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258306409] [2022-04-06 19:34:06,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258306409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:06,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:06,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:34:06,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:06,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [759457050] [2022-04-06 19:34:06,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [759457050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:06,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:06,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:34:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857789218] [2022-04-06 19:34:06,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:06,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:34:06,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:34:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:34:06,997 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:07,076 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-04-06 19:34:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:34:07,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:34:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:07,078 INFO L225 Difference]: With dead ends: 65 [2022-04-06 19:34:07,078 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 19:34:07,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:34:07,080 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:07,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 19:34:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-04-06 19:34:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-04-06 19:34:07,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-04-06 19:34:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:07,087 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-04-06 19:34:07,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-04-06 19:34:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:34:07,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:07,088 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:07,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:34:07,088 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-04-06 19:34:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:07,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868242141] [2022-04-06 19:34:07,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:07,095 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 2 times [2022-04-06 19:34:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452309245] [2022-04-06 19:34:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:07,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:34:07,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452309245] [2022-04-06 19:34:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452309245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139187829] [2022-04-06 19:34:07,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:07,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:07,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:07,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:07,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:34:07,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 19:34:07,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:34:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:34:07,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:34:07,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139187829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:07,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:34:07,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-04-06 19:34:07,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:07,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868242141] [2022-04-06 19:34:07,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868242141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:07,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:07,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:34:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373390695] [2022-04-06 19:34:07,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:07,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:34:07,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:34:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:34:07,428 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:07,477 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-06 19:34:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:34:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 19:34:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:07,478 INFO L225 Difference]: With dead ends: 54 [2022-04-06 19:34:07,478 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 19:34:07,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:34:07,480 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:07,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 148 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:34:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 19:34:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-04-06 19:34:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-04-06 19:34:07,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-04-06 19:34:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:07,487 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-04-06 19:34:07,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-04-06 19:34:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 19:34:07,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:07,492 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:07,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:34:07,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:07,701 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2022-04-06 19:34:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:07,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214206471] [2022-04-06 19:34:07,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:07,703 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 2 times [2022-04-06 19:34:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920244157] [2022-04-06 19:34:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:07,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:34:07,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:07,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920244157] [2022-04-06 19:34:07,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920244157] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633337095] [2022-04-06 19:34:07,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:07,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:07,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:07,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:07,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:34:07,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:07,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:34:07,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:34:07,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:34:07,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633337095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:07,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:34:07,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-04-06 19:34:07,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:07,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214206471] [2022-04-06 19:34:07,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214206471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:07,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:07,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:34:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875028256] [2022-04-06 19:34:07,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:07,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:34:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:34:07,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 19:34:07,961 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:08,002 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-04-06 19:34:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:34:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 19:34:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:08,006 INFO L225 Difference]: With dead ends: 99 [2022-04-06 19:34:08,006 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 19:34:08,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 19:34:08,009 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:08,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:34:08,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 19:34:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-04-06 19:34:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-04-06 19:34:08,016 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-04-06 19:34:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:08,016 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-04-06 19:34:08,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-04-06 19:34:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 19:34:08,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:08,017 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:08,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 19:34:08,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:34:08,224 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2022-04-06 19:34:08,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:08,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1688094981] [2022-04-06 19:34:08,225 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:08,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 2 times [2022-04-06 19:34:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:08,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449177567] [2022-04-06 19:34:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:34:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449177567] [2022-04-06 19:34:08,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449177567] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587287308] [2022-04-06 19:34:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:08,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:08,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:08,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:34:08,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:08,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:34:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:34:08,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:34:08,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587287308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:08,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:34:08,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-04-06 19:34:08,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1688094981] [2022-04-06 19:34:08,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1688094981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:08,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:08,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:34:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989039630] [2022-04-06 19:34:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:08,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:34:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:34:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:34:08,513 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:08,601 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-04-06 19:34:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:34:08,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 19:34:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:08,604 INFO L225 Difference]: With dead ends: 66 [2022-04-06 19:34:08,604 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 19:34:08,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:34:08,606 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:08,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 107 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:34:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 19:34:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 19:34:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-04-06 19:34:08,625 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-04-06 19:34:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:08,625 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-04-06 19:34:08,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-04-06 19:34:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:34:08,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:08,626 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:08,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:08,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:08,835 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2022-04-06 19:34:08,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:08,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1642002179] [2022-04-06 19:34:08,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:08,837 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 2 times [2022-04-06 19:34:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:08,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998624976] [2022-04-06 19:34:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:08,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:08,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:08,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998624976] [2022-04-06 19:34:08,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998624976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:08,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420628738] [2022-04-06 19:34:08,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:08,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:08,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:08,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:34:08,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:09,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:34:09,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:09,216 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:09,216 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 13 [2022-04-06 19:34:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:34:09,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420628738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:09,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:09,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-04-06 19:34:09,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1642002179] [2022-04-06 19:34:09,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1642002179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:09,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:09,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:34:09,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380125227] [2022-04-06 19:34:09,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:09,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:34:09,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:34:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:34:09,246 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:09,354 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-04-06 19:34:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:34:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 19:34:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:09,355 INFO L225 Difference]: With dead ends: 130 [2022-04-06 19:34:09,355 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 19:34:09,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:34:09,356 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:09,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 19:34:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-04-06 19:34:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-04-06 19:34:09,365 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-04-06 19:34:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:09,365 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-04-06 19:34:09,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-04-06 19:34:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:34:09,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:09,366 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:09,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:09,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:09,579 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 3 times [2022-04-06 19:34:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:09,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408540182] [2022-04-06 19:34:09,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:09,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 4 times [2022-04-06 19:34:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:09,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741676698] [2022-04-06 19:34:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:09,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:09,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:09,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741676698] [2022-04-06 19:34:09,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741676698] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:09,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522324703] [2022-04-06 19:34:09,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:09,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:09,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:09,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:09,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:34:09,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:09,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:09,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:09,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:34:09,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:09,908 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:09,909 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 13 [2022-04-06 19:34:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:34:09,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522324703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:09,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:09,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-04-06 19:34:09,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408540182] [2022-04-06 19:34:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408540182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:09,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:09,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:34:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84981522] [2022-04-06 19:34:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:09,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:34:09,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:34:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:34:09,931 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:10,077 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2022-04-06 19:34:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:34:10,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 19:34:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:10,079 INFO L225 Difference]: With dead ends: 157 [2022-04-06 19:34:10,079 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 19:34:10,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:34:10,080 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:10,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 51 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 19:34:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 48. [2022-04-06 19:34:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-04-06 19:34:10,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 31 [2022-04-06 19:34:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:10,105 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-04-06 19:34:10,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-04-06 19:34:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:34:10,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:10,107 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:10,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 19:34:10,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:10,321 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 5 times [2022-04-06 19:34:10,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155959708] [2022-04-06 19:34:10,323 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:10,323 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 6 times [2022-04-06 19:34:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:10,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754797945] [2022-04-06 19:34:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:10,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:10,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:10,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754797945] [2022-04-06 19:34:10,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754797945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721744626] [2022-04-06 19:34:10,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:10,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:10,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:10,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:34:10,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:10,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:10,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:10,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 19:34:10,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:10,652 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:10,653 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 13 [2022-04-06 19:34:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 19:34:10,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721744626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:10,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:10,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-04-06 19:34:10,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:10,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155959708] [2022-04-06 19:34:10,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155959708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:10,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:10,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:34:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917076268] [2022-04-06 19:34:10,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:10,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:34:10,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:34:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:34:10,678 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:10,852 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2022-04-06 19:34:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:34:10,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 19:34:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:10,853 INFO L225 Difference]: With dead ends: 184 [2022-04-06 19:34:10,853 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 19:34:10,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:34:10,854 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 192 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:10,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 63 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 19:34:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 50. [2022-04-06 19:34:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 19:34:10,862 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 33 [2022-04-06 19:34:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:10,863 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 19:34:10,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 19:34:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:34:10,863 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:10,863 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:10,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:11,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:11,074 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 7 times [2022-04-06 19:34:11,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:11,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [408593604] [2022-04-06 19:34:11,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:11,076 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 8 times [2022-04-06 19:34:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129765848] [2022-04-06 19:34:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:11,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129765848] [2022-04-06 19:34:11,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129765848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:11,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202047329] [2022-04-06 19:34:11,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:11,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:11,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:11,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:11,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:34:11,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:11,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:11,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:34:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:11,416 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:11,416 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 13 [2022-04-06 19:34:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:34:11,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202047329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:11,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:11,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-04-06 19:34:11,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [408593604] [2022-04-06 19:34:11,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [408593604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:11,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:11,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:34:11,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740953520] [2022-04-06 19:34:11,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:11,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:34:11,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:34:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:34:11,448 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:11,712 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-04-06 19:34:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:34:11,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 19:34:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:11,714 INFO L225 Difference]: With dead ends: 211 [2022-04-06 19:34:11,714 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 19:34:11,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:34:11,716 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 255 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:11,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 19:34:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 52. [2022-04-06 19:34:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-04-06 19:34:11,744 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 35 [2022-04-06 19:34:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:11,744 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-04-06 19:34:11,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-04-06 19:34:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:34:11,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:11,745 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:11,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:11,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:11,959 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 9 times [2022-04-06 19:34:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:11,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212134862] [2022-04-06 19:34:11,961 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:11,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 10 times [2022-04-06 19:34:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:11,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608401088] [2022-04-06 19:34:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:12,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:12,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608401088] [2022-04-06 19:34:12,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608401088] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139631268] [2022-04-06 19:34:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:12,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:12,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:12,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:34:12,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:12,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:12,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:34:12,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:12,271 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:12,272 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 13 [2022-04-06 19:34:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:34:12,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139631268] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:12,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:12,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-04-06 19:34:12,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:12,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212134862] [2022-04-06 19:34:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212134862] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:12,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:12,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:34:12,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57760100] [2022-04-06 19:34:12,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:12,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:34:12,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:34:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:34:12,303 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:12,655 INFO L93 Difference]: Finished difference Result 238 states and 327 transitions. [2022-04-06 19:34:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:34:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 19:34:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:12,656 INFO L225 Difference]: With dead ends: 238 [2022-04-06 19:34:12,656 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 19:34:12,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:34:12,659 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 303 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:12,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 82 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 19:34:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 54. [2022-04-06 19:34:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-04-06 19:34:12,670 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2022-04-06 19:34:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:12,670 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-04-06 19:34:12,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-04-06 19:34:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:34:12,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:12,671 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:12,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:12,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:34:12,889 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 11 times [2022-04-06 19:34:12,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:12,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [140805286] [2022-04-06 19:34:12,890 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:12,890 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 12 times [2022-04-06 19:34:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932267611] [2022-04-06 19:34:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:12,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:12,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:12,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932267611] [2022-04-06 19:34:12,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932267611] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:12,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933699653] [2022-04-06 19:34:12,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:12,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:12,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:12,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:12,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:34:13,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:13,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:34:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:13,226 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:13,227 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 13 [2022-04-06 19:34:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:34:13,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933699653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:13,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:13,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-04-06 19:34:13,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [140805286] [2022-04-06 19:34:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [140805286] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:13,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:13,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:34:13,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152215472] [2022-04-06 19:34:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:13,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:34:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:34:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:34:13,261 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:13,701 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-04-06 19:34:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:34:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 19:34:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:13,703 INFO L225 Difference]: With dead ends: 265 [2022-04-06 19:34:13,703 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 19:34:13,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:34:13,704 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 351 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:13,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 94 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 19:34:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 56. [2022-04-06 19:34:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-04-06 19:34:13,716 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-04-06 19:34:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:13,716 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-04-06 19:34:13,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-04-06 19:34:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 19:34:13,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:13,718 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:13,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:13,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:13,933 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 13 times [2022-04-06 19:34:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:13,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545161989] [2022-04-06 19:34:13,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:13,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 14 times [2022-04-06 19:34:13,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:13,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703661058] [2022-04-06 19:34:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:14,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703661058] [2022-04-06 19:34:14,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703661058] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366211445] [2022-04-06 19:34:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:14,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:14,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:34:14,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:14,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:14,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:14,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 19:34:14,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:14,313 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:14,313 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 13 [2022-04-06 19:34:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 19:34:14,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366211445] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:14,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:14,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-04-06 19:34:14,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:14,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545161989] [2022-04-06 19:34:14,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545161989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:14,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:14,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168346462] [2022-04-06 19:34:14,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:14,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:34:14,350 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:14,951 INFO L93 Difference]: Finished difference Result 292 states and 403 transitions. [2022-04-06 19:34:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:14,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 19:34:14,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:14,953 INFO L225 Difference]: With dead ends: 292 [2022-04-06 19:34:14,953 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 19:34:14,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:34:14,954 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:14,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:34:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 19:34:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 58. [2022-04-06 19:34:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-04-06 19:34:14,967 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 41 [2022-04-06 19:34:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:14,969 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-04-06 19:34:14,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-04-06 19:34:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 19:34:14,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:14,970 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:15,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:15,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:34:15,183 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 15 times [2022-04-06 19:34:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:15,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409453034] [2022-04-06 19:34:15,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:15,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 16 times [2022-04-06 19:34:15,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:15,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398153940] [2022-04-06 19:34:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:15,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398153940] [2022-04-06 19:34:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398153940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622100044] [2022-04-06 19:34:15,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:15,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:15,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:34:15,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:15,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 19:34:15,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:15,625 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:15,625 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 13 [2022-04-06 19:34:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 19:34:15,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622100044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:15,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:15,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-04-06 19:34:15,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409453034] [2022-04-06 19:34:15,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409453034] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:15,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:15,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:34:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620253023] [2022-04-06 19:34:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:15,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:34:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:34:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:34:15,664 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:16,429 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2022-04-06 19:34:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:16,429 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 19:34:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:16,430 INFO L225 Difference]: With dead ends: 319 [2022-04-06 19:34:16,430 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 19:34:16,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:16,431 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:16,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:34:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 19:34:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 60. [2022-04-06 19:34:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-04-06 19:34:16,445 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 43 [2022-04-06 19:34:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:16,445 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-04-06 19:34:16,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-04-06 19:34:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:34:16,446 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:16,446 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:16,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:16,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:34:16,663 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:16,663 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 17 times [2022-04-06 19:34:16,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:16,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052620773] [2022-04-06 19:34:16,664 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:16,664 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 18 times [2022-04-06 19:34:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:16,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991373708] [2022-04-06 19:34:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:16,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:34:16,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991373708] [2022-04-06 19:34:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991373708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027132658] [2022-04-06 19:34:16,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:16,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:16,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:34:16,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:16,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:16,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 19:34:17,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:17,074 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:17,074 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 13 [2022-04-06 19:34:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 19:34:17,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027132658] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:17,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:17,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-04-06 19:34:17,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:17,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052620773] [2022-04-06 19:34:17,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052620773] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:17,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:17,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:34:17,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659464101] [2022-04-06 19:34:17,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:17,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:34:17,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:34:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:34:17,117 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:18,013 INFO L93 Difference]: Finished difference Result 346 states and 479 transitions. [2022-04-06 19:34:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:18,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 19:34:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:18,015 INFO L225 Difference]: With dead ends: 346 [2022-04-06 19:34:18,015 INFO L226 Difference]: Without dead ends: 311 [2022-04-06 19:34:18,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:34:18,016 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 405 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:18,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 160 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:34:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-04-06 19:34:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 62. [2022-04-06 19:34:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-04-06 19:34:18,032 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 45 [2022-04-06 19:34:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:18,032 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-04-06 19:34:18,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-04-06 19:34:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 19:34:18,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:18,045 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:18,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:18,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:34:18,259 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 19 times [2022-04-06 19:34:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:18,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [732117424] [2022-04-06 19:34:18,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:18,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 20 times [2022-04-06 19:34:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:18,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144615556] [2022-04-06 19:34:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:18,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:18,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:18,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144615556] [2022-04-06 19:34:18,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144615556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:18,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509561478] [2022-04-06 19:34:18,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:18,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:18,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:18,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:18,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:34:18,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:18,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:18,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:18,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:18,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:18,580 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:18,581 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 13 [2022-04-06 19:34:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:18,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509561478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:18,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:18,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-04-06 19:34:18,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [732117424] [2022-04-06 19:34:18,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [732117424] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:18,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:18,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:34:18,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639078790] [2022-04-06 19:34:18,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:18,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:34:18,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:18,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:34:18,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:34:18,614 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:18,707 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-04-06 19:34:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:34:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 19:34:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:18,715 INFO L225 Difference]: With dead ends: 115 [2022-04-06 19:34:18,715 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 19:34:18,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:34:18,716 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:18,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 19:34:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-04-06 19:34:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-04-06 19:34:18,738 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2022-04-06 19:34:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:18,739 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-04-06 19:34:18,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-04-06 19:34:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 19:34:18,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:18,739 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:18,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:18,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:34:18,949 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 21 times [2022-04-06 19:34:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:18,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494051882] [2022-04-06 19:34:18,950 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:18,950 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 22 times [2022-04-06 19:34:18,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:18,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155114537] [2022-04-06 19:34:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:18,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:19,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155114537] [2022-04-06 19:34:19,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155114537] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068409255] [2022-04-06 19:34:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:19,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:19,014 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:19,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:34:19,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:19,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 19:34:19,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:19,317 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:19,318 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 13 [2022-04-06 19:34:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 19:34:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068409255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:19,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-04-06 19:34:19,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494051882] [2022-04-06 19:34:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494051882] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:19,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:34:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758531800] [2022-04-06 19:34:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:19,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:34:19,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:34:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:34:19,354 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:19,465 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-04-06 19:34:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:34:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 19:34:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:19,465 INFO L225 Difference]: With dead ends: 143 [2022-04-06 19:34:19,465 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 19:34:19,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:34:19,466 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:19,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 19:34:19,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-04-06 19:34:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-04-06 19:34:19,494 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-04-06 19:34:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:19,495 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-04-06 19:34:19,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-04-06 19:34:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:34:19,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:19,495 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:19,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:19,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:19,696 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 23 times [2022-04-06 19:34:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:19,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988650425] [2022-04-06 19:34:19,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:19,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 24 times [2022-04-06 19:34:19,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:19,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655480758] [2022-04-06 19:34:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:19,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:19,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:19,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655480758] [2022-04-06 19:34:19,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655480758] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:19,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703134240] [2022-04-06 19:34:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:19,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:19,748 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:19,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:34:19,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:19,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:19,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 19:34:19,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:20,034 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:20,035 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 13 [2022-04-06 19:34:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 19:34:20,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703134240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:20,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:20,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-04-06 19:34:20,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:20,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988650425] [2022-04-06 19:34:20,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988650425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:20,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:20,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:34:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430022619] [2022-04-06 19:34:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:20,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:34:20,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:34:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:34:20,079 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:20,263 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2022-04-06 19:34:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:34:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 19:34:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:20,266 INFO L225 Difference]: With dead ends: 167 [2022-04-06 19:34:20,266 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 19:34:20,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:34:20,266 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:20,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 19:34:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-04-06 19:34:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-04-06 19:34:20,316 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 53 [2022-04-06 19:34:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:20,316 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-04-06 19:34:20,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-04-06 19:34:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 19:34:20,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:20,317 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:20,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 19:34:20,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:34:20,519 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 25 times [2022-04-06 19:34:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828381750] [2022-04-06 19:34:20,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:20,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 26 times [2022-04-06 19:34:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613016822] [2022-04-06 19:34:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:20,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613016822] [2022-04-06 19:34:20,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613016822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545892859] [2022-04-06 19:34:20,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:20,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:20,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:20,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:20,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:34:20,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:20,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:20,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 19:34:20,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:20,900 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:20,901 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 13 [2022-04-06 19:34:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 19:34:20,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545892859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:20,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-04-06 19:34:20,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828381750] [2022-04-06 19:34:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828381750] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:20,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:34:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607604656] [2022-04-06 19:34:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:20,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:34:20,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:34:20,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:34:20,937 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:21,140 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-04-06 19:34:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:34:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 19:34:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:21,141 INFO L225 Difference]: With dead ends: 191 [2022-04-06 19:34:21,141 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 19:34:21,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:34:21,142 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:21,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 56 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 19:34:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-04-06 19:34:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2660550458715596) internal successors, (138), 109 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-04-06 19:34:21,183 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 56 [2022-04-06 19:34:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:21,183 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-04-06 19:34:21,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-04-06 19:34:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:34:21,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:21,183 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:21,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:21,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:34:21,390 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 27 times [2022-04-06 19:34:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787521624] [2022-04-06 19:34:21,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:21,391 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 28 times [2022-04-06 19:34:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:21,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641309871] [2022-04-06 19:34:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:21,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641309871] [2022-04-06 19:34:21,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641309871] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610217297] [2022-04-06 19:34:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:21,467 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:21,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:34:21,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:21,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:21,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 19:34:21,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:21,806 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:21,806 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 13 [2022-04-06 19:34:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 19:34:21,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610217297] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:21,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:21,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-04-06 19:34:21,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787521624] [2022-04-06 19:34:21,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787521624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:21,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:21,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:34:21,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200028603] [2022-04-06 19:34:21,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:21,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:34:21,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:34:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:34:21,841 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:22,098 INFO L93 Difference]: Finished difference Result 215 states and 281 transitions. [2022-04-06 19:34:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:34:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 19:34:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:22,099 INFO L225 Difference]: With dead ends: 215 [2022-04-06 19:34:22,099 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 19:34:22,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:34:22,100 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:22,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 80 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 19:34:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-04-06 19:34:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-04-06 19:34:22,146 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 59 [2022-04-06 19:34:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:22,146 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-04-06 19:34:22,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-04-06 19:34:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 19:34:22,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:22,147 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:22,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:22,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:22,364 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 29 times [2022-04-06 19:34:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:22,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926476291] [2022-04-06 19:34:22,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:22,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 30 times [2022-04-06 19:34:22,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:22,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638041518] [2022-04-06 19:34:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:22,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:22,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:22,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:22,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638041518] [2022-04-06 19:34:22,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638041518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:22,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946975782] [2022-04-06 19:34:22,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:22,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:22,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:22,443 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:22,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:34:22,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:22,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:22,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:22,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 19:34:22,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:22,814 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:22,814 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 13 [2022-04-06 19:34:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 19:34:22,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946975782] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:22,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:22,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-04-06 19:34:22,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:22,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926476291] [2022-04-06 19:34:22,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926476291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:22,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:22,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:34:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884519254] [2022-04-06 19:34:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:22,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:34:22,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:34:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:34:22,865 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:23,150 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2022-04-06 19:34:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:34:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 19:34:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:23,156 INFO L225 Difference]: With dead ends: 239 [2022-04-06 19:34:23,156 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 19:34:23,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:34:23,156 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:23,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 19:34:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-04-06 19:34:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 133 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-04-06 19:34:23,208 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 62 [2022-04-06 19:34:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:23,208 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-04-06 19:34:23,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-04-06 19:34:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:34:23,209 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:23,209 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:23,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:23,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:23,411 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 31 times [2022-04-06 19:34:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453220519] [2022-04-06 19:34:23,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:23,412 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 32 times [2022-04-06 19:34:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:23,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478716712] [2022-04-06 19:34:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:23,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:23,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:23,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:23,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478716712] [2022-04-06 19:34:23,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478716712] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:23,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764140992] [2022-04-06 19:34:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:23,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:23,509 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:23,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:34:23,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:23,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:23,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 19:34:23,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:23,900 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:23,901 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 13 [2022-04-06 19:34:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 19:34:23,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764140992] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:23,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:23,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-04-06 19:34:23,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453220519] [2022-04-06 19:34:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453220519] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:23,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492359968] [2022-04-06 19:34:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:23,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:34:23,940 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:24,288 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2022-04-06 19:34:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 19:34:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:24,289 INFO L225 Difference]: With dead ends: 263 [2022-04-06 19:34:24,289 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 19:34:24,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:34:24,290 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:24,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 73 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 19:34:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-04-06 19:34:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.282758620689655) internal successors, (186), 145 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-04-06 19:34:24,348 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 65 [2022-04-06 19:34:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:24,348 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-04-06 19:34:24,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-04-06 19:34:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:24,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:24,349 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:24,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:24,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:24,560 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 33 times [2022-04-06 19:34:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:24,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087119692] [2022-04-06 19:34:24,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:24,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 34 times [2022-04-06 19:34:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:24,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386347597] [2022-04-06 19:34:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:24,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386347597] [2022-04-06 19:34:24,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386347597] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935072645] [2022-04-06 19:34:24,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:24,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:24,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:24,928 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:24,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:34:25,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:25,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:25,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:25,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:25,386 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:25,387 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 13 [2022-04-06 19:34:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:25,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935072645] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:25,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:25,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-04-06 19:34:25,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:25,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087119692] [2022-04-06 19:34:25,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087119692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:25,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:25,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:34:25,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890525915] [2022-04-06 19:34:25,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:25,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:34:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:34:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:34:25,431 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:26,137 INFO L93 Difference]: Finished difference Result 224 states and 287 transitions. [2022-04-06 19:34:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:34:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-04-06 19:34:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:26,138 INFO L225 Difference]: With dead ends: 224 [2022-04-06 19:34:26,138 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 19:34:26,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:34:26,139 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 165 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:26,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 79 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 19:34:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-04-06 19:34:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 157 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 205 transitions. [2022-04-06 19:34:26,218 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 205 transitions. Word has length 68 [2022-04-06 19:34:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:26,218 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 205 transitions. [2022-04-06 19:34:26,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 205 transitions. [2022-04-06 19:34:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:26,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:26,219 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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] [2022-04-06 19:34:26,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:26,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 19:34:26,436 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 1 times [2022-04-06 19:34:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:26,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536580582] [2022-04-06 19:34:26,438 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:26,438 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 2 times [2022-04-06 19:34:26,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:26,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293525172] [2022-04-06 19:34:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:26,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 19:34:26,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:26,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293525172] [2022-04-06 19:34:26,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293525172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:26,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130370234] [2022-04-06 19:34:26,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:26,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:26,776 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:26,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:34:26,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:26,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:27,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:27,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:27,219 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:27,219 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 13 [2022-04-06 19:34:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:27,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130370234] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:27,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:27,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-04-06 19:34:27,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536580582] [2022-04-06 19:34:27,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536580582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:27,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:27,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:34:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266102303] [2022-04-06 19:34:27,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:27,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:34:27,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:27,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:34:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:34:27,262 INFO L87 Difference]: Start difference. First operand 162 states and 205 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:27,711 INFO L93 Difference]: Finished difference Result 235 states and 300 transitions. [2022-04-06 19:34:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 68 [2022-04-06 19:34:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:27,712 INFO L225 Difference]: With dead ends: 235 [2022-04-06 19:34:27,712 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 19:34:27,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:27,713 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 92 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:27,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 77 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 19:34:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 19:34:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2738853503184713) internal successors, (200), 157 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-04-06 19:34:27,787 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 68 [2022-04-06 19:34:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:27,787 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-04-06 19:34:27,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-04-06 19:34:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:27,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:27,788 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:27,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 19:34:28,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 19:34:28,003 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash 200480026, now seen corresponding path program 3 times [2022-04-06 19:34:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233198324] [2022-04-06 19:34:28,005 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:28,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 200480026, now seen corresponding path program 4 times [2022-04-06 19:34:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:28,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338432064] [2022-04-06 19:34:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:28,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 19:34:28,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:28,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338432064] [2022-04-06 19:34:28,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338432064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:28,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180475134] [2022-04-06 19:34:28,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:28,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:28,345 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:28,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:34:28,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:28,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:28,662 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 [2022-04-06 19:34:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:28,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:28,807 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:28,807 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 13 [2022-04-06 19:34:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:28,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180475134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:28,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:28,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:28,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233198324] [2022-04-06 19:34:28,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233198324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:28,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:28,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:28,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793733600] [2022-04-06 19:34:28,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:28,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:28,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:28,847 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:29,424 INFO L93 Difference]: Finished difference Result 235 states and 298 transitions. [2022-04-06 19:34:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:29,426 INFO L225 Difference]: With dead ends: 235 [2022-04-06 19:34:29,426 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 19:34:29,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:34:29,427 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:29,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 84 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 19:34:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 19:34:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.267515923566879) internal successors, (199), 157 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-04-06 19:34:29,501 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 68 [2022-04-06 19:34:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:29,501 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-04-06 19:34:29,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-04-06 19:34:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:29,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:29,501 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:29,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:29,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:29,708 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 5 times [2022-04-06 19:34:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994104020] [2022-04-06 19:34:29,709 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:29,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 6 times [2022-04-06 19:34:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971922268] [2022-04-06 19:34:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:30,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 19:34:30,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971922268] [2022-04-06 19:34:30,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971922268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048883122] [2022-04-06 19:34:30,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:30,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:30,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:30,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:34:30,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:30,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:30,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:30,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:30,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:30,419 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:30,419 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 13 [2022-04-06 19:34:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:30,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048883122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:30,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:30,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-04-06 19:34:30,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994104020] [2022-04-06 19:34:30,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994104020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:30,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:30,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:34:30,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749626009] [2022-04-06 19:34:30,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:30,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:34:30,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:30,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:34:30,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:34:30,472 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:30,973 INFO L93 Difference]: Finished difference Result 235 states and 296 transitions. [2022-04-06 19:34:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:30,974 INFO L225 Difference]: With dead ends: 235 [2022-04-06 19:34:30,974 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 19:34:30,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:34:30,975 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:30,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 78 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 19:34:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 19:34:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2611464968152866) internal successors, (198), 157 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-04-06 19:34:31,060 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 68 [2022-04-06 19:34:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:31,060 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-04-06 19:34:31,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-04-06 19:34:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:31,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:31,061 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:31,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 19:34:31,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:31,276 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 7 times [2022-04-06 19:34:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356614985] [2022-04-06 19:34:31,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:31,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 8 times [2022-04-06 19:34:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083684298] [2022-04-06 19:34:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:31,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-04-06 19:34:31,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:31,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083684298] [2022-04-06 19:34:31,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083684298] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:31,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393467325] [2022-04-06 19:34:31,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:31,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:31,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:31,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:34:31,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:31,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:31,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:31,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:31,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:32,072 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:32,073 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 13 [2022-04-06 19:34:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:32,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393467325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:32,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:32,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-04-06 19:34:32,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:32,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356614985] [2022-04-06 19:34:32,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356614985] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:32,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:32,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:32,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582735082] [2022-04-06 19:34:32,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:32,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:32,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:32,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:34:32,112 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:32,567 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2022-04-06 19:34:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:32,568 INFO L225 Difference]: With dead ends: 242 [2022-04-06 19:34:32,568 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 19:34:32,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:34:32,569 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:32,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 63 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 19:34:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-04-06 19:34:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-04-06 19:34:32,652 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-04-06 19:34:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:32,653 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-04-06 19:34:32,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-04-06 19:34:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:32,653 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:32,653 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 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] [2022-04-06 19:34:32,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 19:34:32,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:34:32,860 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 9 times [2022-04-06 19:34:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:32,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643585981] [2022-04-06 19:34:32,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:32,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 10 times [2022-04-06 19:34:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:32,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173200130] [2022-04-06 19:34:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:33,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173200130] [2022-04-06 19:34:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173200130] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713541038] [2022-04-06 19:34:33,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:33,134 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:33,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:34:33,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:33,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:33,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:33,592 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:33,593 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 13 [2022-04-06 19:34:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:33,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713541038] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:33,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:33,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-04-06 19:34:33,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643585981] [2022-04-06 19:34:33,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643585981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:33,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:33,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:34:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249143683] [2022-04-06 19:34:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:33,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:34:33,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:34:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:34:33,631 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:34,468 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-04-06 19:34:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:34:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-04-06 19:34:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:34,470 INFO L225 Difference]: With dead ends: 254 [2022-04-06 19:34:34,470 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 19:34:34,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:34:34,470 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:34,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 103 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:34:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 19:34:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-04-06 19:34:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2590361445783131) internal successors, (209), 166 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2022-04-06 19:34:34,558 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 68 [2022-04-06 19:34:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:34,559 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2022-04-06 19:34:34,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2022-04-06 19:34:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:34,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:34,559 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:34,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 19:34:34,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:34:34,762 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 11 times [2022-04-06 19:34:34,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:34,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398116528] [2022-04-06 19:34:34,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:34,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 12 times [2022-04-06 19:34:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:34,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970941531] [2022-04-06 19:34:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:34,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:35,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 19:34:35,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970941531] [2022-04-06 19:34:35,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970941531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924296738] [2022-04-06 19:34:35,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:35,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:35,065 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:35,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:34:35,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:35,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:35,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:35,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:35,510 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:35,510 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 13 [2022-04-06 19:34:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:35,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924296738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:35,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:35,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:35,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398116528] [2022-04-06 19:34:35,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398116528] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:35,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:35,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145622639] [2022-04-06 19:34:35,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:35,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:35,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:35,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:35,553 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:36,156 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-04-06 19:34:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:36,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:36,159 INFO L225 Difference]: With dead ends: 254 [2022-04-06 19:34:36,159 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 19:34:36,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:34:36,160 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:36,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 93 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 19:34:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-04-06 19:34:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-04-06 19:34:36,242 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-04-06 19:34:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:36,242 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-04-06 19:34:36,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-04-06 19:34:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:36,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:36,243 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:36,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 19:34:36,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:34:36,446 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1636098984, now seen corresponding path program 13 times [2022-04-06 19:34:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:36,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852249440] [2022-04-06 19:34:36,448 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:36,448 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1636098984, now seen corresponding path program 14 times [2022-04-06 19:34:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761746803] [2022-04-06 19:34:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 19:34:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761746803] [2022-04-06 19:34:36,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761746803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376157694] [2022-04-06 19:34:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:36,760 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:34:36,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:37,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:37,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:37,205 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:37,206 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 13 [2022-04-06 19:34:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:37,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376157694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:37,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:37,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:37,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852249440] [2022-04-06 19:34:37,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852249440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:37,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:37,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245490068] [2022-04-06 19:34:37,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:37,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:37,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:37,247 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:37,783 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-04-06 19:34:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:37,784 INFO L225 Difference]: With dead ends: 251 [2022-04-06 19:34:37,784 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 19:34:37,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:34:37,785 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:37,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 77 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 19:34:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-04-06 19:34:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-04-06 19:34:37,865 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-04-06 19:34:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:37,866 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-04-06 19:34:37,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-04-06 19:34:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:37,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:37,866 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:37,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 19:34:38,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:34:38,068 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 15 times [2022-04-06 19:34:38,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203680855] [2022-04-06 19:34:38,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:38,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 16 times [2022-04-06 19:34:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:38,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220852922] [2022-04-06 19:34:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:38,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220852922] [2022-04-06 19:34:38,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220852922] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838347898] [2022-04-06 19:34:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:38,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:38,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:38,396 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:38,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:34:38,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:38,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:38,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:38,808 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:38,809 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 13 [2022-04-06 19:34:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:38,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838347898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:38,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:38,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 25 [2022-04-06 19:34:38,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203680855] [2022-04-06 19:34:38,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203680855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:38,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:38,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:34:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945463477] [2022-04-06 19:34:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:38,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:34:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:34:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:34:38,847 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:39,535 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-04-06 19:34:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:34:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 68 [2022-04-06 19:34:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:39,536 INFO L225 Difference]: With dead ends: 257 [2022-04-06 19:34:39,536 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 19:34:39,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:34:39,537 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 141 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:39,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 89 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:34:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 19:34:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-04-06 19:34:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-04-06 19:34:39,626 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-04-06 19:34:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:39,626 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-04-06 19:34:39,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-04-06 19:34:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:39,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:39,627 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:39,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 19:34:39,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:39,827 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 17 times [2022-04-06 19:34:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:39,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700587587] [2022-04-06 19:34:39,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:39,828 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 18 times [2022-04-06 19:34:39,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:39,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535024663] [2022-04-06 19:34:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 19:34:40,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535024663] [2022-04-06 19:34:40,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535024663] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920494349] [2022-04-06 19:34:40,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:40,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:40,135 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:40,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:34:40,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:40,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:40,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:40,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:40,551 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:40,551 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 13 [2022-04-06 19:34:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:40,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920494349] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:40,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:40,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:40,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:40,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700587587] [2022-04-06 19:34:40,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700587587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:40,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:40,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063796641] [2022-04-06 19:34:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:40,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:40,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:40,592 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:41,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:41,171 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-04-06 19:34:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:41,179 INFO L225 Difference]: With dead ends: 257 [2022-04-06 19:34:41,180 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 19:34:41,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:34:41,180 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:41,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 70 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 19:34:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-04-06 19:34:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-04-06 19:34:41,273 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 68 [2022-04-06 19:34:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:41,273 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-04-06 19:34:41,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-04-06 19:34:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:41,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:41,274 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:41,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:41,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:41,489 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 19 times [2022-04-06 19:34:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:41,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1470390676] [2022-04-06 19:34:41,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:41,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 20 times [2022-04-06 19:34:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:41,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972046708] [2022-04-06 19:34:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:41,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:41,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:41,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:41,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972046708] [2022-04-06 19:34:41,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972046708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:41,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731947135] [2022-04-06 19:34:41,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:41,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:41,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:41,807 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:41,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:34:41,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:41,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:42,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:42,268 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:42,269 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 13 [2022-04-06 19:34:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:42,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731947135] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:42,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:42,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-04-06 19:34:42,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:42,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1470390676] [2022-04-06 19:34:42,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1470390676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:42,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:42,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:34:42,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949344141] [2022-04-06 19:34:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:42,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:34:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:34:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:34:42,312 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:43,006 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-04-06 19:34:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:34:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-04-06 19:34:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:43,007 INFO L225 Difference]: With dead ends: 263 [2022-04-06 19:34:43,007 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 19:34:43,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:34:43,008 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 133 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:43,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 95 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 19:34:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2022-04-06 19:34:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-04-06 19:34:43,093 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-04-06 19:34:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:43,093 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-04-06 19:34:43,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-04-06 19:34:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:43,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:43,094 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:43,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:43,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 19:34:43,295 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 21 times [2022-04-06 19:34:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:43,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389930450] [2022-04-06 19:34:43,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:43,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 22 times [2022-04-06 19:34:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:43,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128454470] [2022-04-06 19:34:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:43,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 19:34:43,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128454470] [2022-04-06 19:34:43,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128454470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492993350] [2022-04-06 19:34:43,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:43,641 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:43,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:34:43,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:43,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:43,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:43,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:43,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:44,086 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:44,087 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 13 [2022-04-06 19:34:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:44,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492993350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:44,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:44,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-04-06 19:34:44,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:44,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389930450] [2022-04-06 19:34:44,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389930450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:44,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:44,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:34:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758466204] [2022-04-06 19:34:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:44,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:34:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:34:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:34:44,136 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:44,641 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-04-06 19:34:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:44,641 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 68 [2022-04-06 19:34:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:44,642 INFO L225 Difference]: With dead ends: 251 [2022-04-06 19:34:44,642 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 19:34:44,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:44,643 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 82 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:44,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 19:34:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-04-06 19:34:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-04-06 19:34:44,736 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-04-06 19:34:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:44,737 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-04-06 19:34:44,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-04-06 19:34:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:44,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:44,737 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:44,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 19:34:44,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:44,947 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 23 times [2022-04-06 19:34:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1473030792] [2022-04-06 19:34:44,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:44,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 24 times [2022-04-06 19:34:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890797197] [2022-04-06 19:34:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 19:34:45,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890797197] [2022-04-06 19:34:45,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890797197] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808095539] [2022-04-06 19:34:45,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:45,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:45,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:45,306 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:45,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:34:45,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:45,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:45,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:45,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:45,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:45,729 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:45,729 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 13 [2022-04-06 19:34:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:45,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808095539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:45,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:45,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:45,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:45,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1473030792] [2022-04-06 19:34:45,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1473030792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:45,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:45,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760065682] [2022-04-06 19:34:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:45,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:45,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:45,768 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:46,360 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-04-06 19:34:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:46,361 INFO L225 Difference]: With dead ends: 257 [2022-04-06 19:34:46,361 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 19:34:46,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:34:46,362 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:46,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 19:34:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-04-06 19:34:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-04-06 19:34:46,459 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 68 [2022-04-06 19:34:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:46,459 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-04-06 19:34:46,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-04-06 19:34:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:46,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:46,459 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:46,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:46,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:46,675 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:46,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 25 times [2022-04-06 19:34:46,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:46,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523647360] [2022-04-06 19:34:46,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:46,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 26 times [2022-04-06 19:34:46,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:46,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759434807] [2022-04-06 19:34:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:46,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:47,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 19:34:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759434807] [2022-04-06 19:34:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759434807] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794525064] [2022-04-06 19:34:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:47,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:47,046 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:47,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:34:47,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:47,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:47,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:47,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:47,492 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:47,492 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 13 [2022-04-06 19:34:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:47,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794525064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:47,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:47,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:47,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:47,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523647360] [2022-04-06 19:34:47,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523647360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:47,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:47,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:47,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519030379] [2022-04-06 19:34:47,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:47,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:47,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:47,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:47,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:47,532 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:48,154 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-04-06 19:34:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:48,157 INFO L225 Difference]: With dead ends: 263 [2022-04-06 19:34:48,157 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 19:34:48,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:34:48,158 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:48,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 19:34:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-04-06 19:34:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.244186046511628) internal successors, (214), 172 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 218 transitions. [2022-04-06 19:34:48,246 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 218 transitions. Word has length 68 [2022-04-06 19:34:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:48,246 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 218 transitions. [2022-04-06 19:34:48,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 218 transitions. [2022-04-06 19:34:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:48,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:48,247 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:48,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:48,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 19:34:48,460 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 27 times [2022-04-06 19:34:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:48,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430456092] [2022-04-06 19:34:48,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:48,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 28 times [2022-04-06 19:34:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:48,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147985672] [2022-04-06 19:34:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:48,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147985672] [2022-04-06 19:34:48,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147985672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:48,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039531246] [2022-04-06 19:34:48,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:48,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:48,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:48,897 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:48,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:34:49,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:49,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:49,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:49,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:49,330 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:49,330 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 13 [2022-04-06 19:34:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:49,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039531246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:49,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:49,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-04-06 19:34:49,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:49,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430456092] [2022-04-06 19:34:49,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430456092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:49,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:49,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:34:49,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348235247] [2022-04-06 19:34:49,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:49,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:34:49,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:34:49,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:34:49,371 INFO L87 Difference]: Start difference. First operand 177 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:50,201 INFO L93 Difference]: Finished difference Result 305 states and 371 transitions. [2022-04-06 19:34:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:34:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-04-06 19:34:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:50,208 INFO L225 Difference]: With dead ends: 305 [2022-04-06 19:34:50,208 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 19:34:50,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:34:50,209 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 140 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:50,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 85 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 19:34:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2022-04-06 19:34:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2459893048128343) internal successors, (233), 187 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 237 transitions. [2022-04-06 19:34:50,318 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 237 transitions. Word has length 68 [2022-04-06 19:34:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:50,318 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 237 transitions. [2022-04-06 19:34:50,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 237 transitions. [2022-04-06 19:34:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:50,319 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:50,319 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:50,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 19:34:50,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 19:34:50,523 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 29 times [2022-04-06 19:34:50,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550369779] [2022-04-06 19:34:50,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:50,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 30 times [2022-04-06 19:34:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:50,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022094088] [2022-04-06 19:34:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:50,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 19:34:50,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022094088] [2022-04-06 19:34:50,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022094088] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093687446] [2022-04-06 19:34:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:50,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:50,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:50,801 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:34:50,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:51,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:51,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:51,203 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:51,203 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 13 [2022-04-06 19:34:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093687446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:51,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-04-06 19:34:51,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:51,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550369779] [2022-04-06 19:34:51,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550369779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:51,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:51,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:34:51,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584878033] [2022-04-06 19:34:51,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:51,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:34:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:34:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:34:51,241 INFO L87 Difference]: Start difference. First operand 192 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:51,540 INFO L93 Difference]: Finished difference Result 299 states and 369 transitions. [2022-04-06 19:34:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:34:51,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 68 [2022-04-06 19:34:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:51,541 INFO L225 Difference]: With dead ends: 299 [2022-04-06 19:34:51,541 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 19:34:51,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:34:51,542 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:51,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 19:34:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-04-06 19:34:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-04-06 19:34:51,648 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 68 [2022-04-06 19:34:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:51,648 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-04-06 19:34:51,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-04-06 19:34:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:51,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:51,649 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:51,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 19:34:51,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:34:51,850 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 31 times [2022-04-06 19:34:51,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [573919330] [2022-04-06 19:34:51,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:51,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:51,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 32 times [2022-04-06 19:34:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:51,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026379577] [2022-04-06 19:34:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-04-06 19:34:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026379577] [2022-04-06 19:34:52,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026379577] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079836065] [2022-04-06 19:34:52,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:52,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:52,142 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:52,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:34:52,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:52,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:52,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:52,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:52,605 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:52,605 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 13 [2022-04-06 19:34:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:52,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079836065] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:52,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:52,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-04-06 19:34:52,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [573919330] [2022-04-06 19:34:52,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [573919330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:52,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:52,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:34:52,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177877543] [2022-04-06 19:34:52,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:52,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:34:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:34:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:34:52,642 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:53,062 INFO L93 Difference]: Finished difference Result 312 states and 384 transitions. [2022-04-06 19:34:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:53,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:53,063 INFO L225 Difference]: With dead ends: 312 [2022-04-06 19:34:53,063 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 19:34:53,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:34:53,064 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:53,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 64 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 19:34:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-04-06 19:34:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.236180904522613) internal successors, (246), 199 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2022-04-06 19:34:53,181 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 68 [2022-04-06 19:34:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:53,182 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2022-04-06 19:34:53,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2022-04-06 19:34:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:53,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:53,182 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:53,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 19:34:53,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:53,395 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 33 times [2022-04-06 19:34:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545560186] [2022-04-06 19:34:53,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:53,397 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:53,397 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 34 times [2022-04-06 19:34:53,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:53,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407199699] [2022-04-06 19:34:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 19:34:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407199699] [2022-04-06 19:34:53,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407199699] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177409255] [2022-04-06 19:34:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:53,680 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:53,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:34:53,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:53,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:54,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:54,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:54,147 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:54,148 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 13 [2022-04-06 19:34:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:54,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177409255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:54,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:54,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-04-06 19:34:54,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:54,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545560186] [2022-04-06 19:34:54,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545560186] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:54,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:54,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:34:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150479231] [2022-04-06 19:34:54,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:54,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:34:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:34:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:34:54,192 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:54,674 INFO L93 Difference]: Finished difference Result 327 states and 400 transitions. [2022-04-06 19:34:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:54,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 68 [2022-04-06 19:34:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:54,675 INFO L225 Difference]: With dead ends: 327 [2022-04-06 19:34:54,675 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 19:34:54,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:34:54,676 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:54,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 65 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 19:34:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2022-04-06 19:34:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2292682926829268) internal successors, (252), 205 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 256 transitions. [2022-04-06 19:34:54,791 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 256 transitions. Word has length 68 [2022-04-06 19:34:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:54,791 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 256 transitions. [2022-04-06 19:34:54,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 256 transitions. [2022-04-06 19:34:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:54,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:54,792 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:54,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:54,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:34:54,993 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 35 times [2022-04-06 19:34:54,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419258611] [2022-04-06 19:34:54,994 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:54,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 36 times [2022-04-06 19:34:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:54,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356070458] [2022-04-06 19:34:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 19:34:55,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:55,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356070458] [2022-04-06 19:34:55,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356070458] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:55,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822056216] [2022-04-06 19:34:55,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:55,350 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:55,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:34:55,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:34:55,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:55,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:55,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:55,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:55,796 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:55,797 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 13 [2022-04-06 19:34:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822056216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:55,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:55,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-04-06 19:34:55,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419258611] [2022-04-06 19:34:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419258611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:55,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:55,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310856037] [2022-04-06 19:34:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:55,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:34:55,837 INFO L87 Difference]: Start difference. First operand 210 states and 256 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:56,395 INFO L93 Difference]: Finished difference Result 339 states and 412 transitions. [2022-04-06 19:34:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:56,396 INFO L225 Difference]: With dead ends: 339 [2022-04-06 19:34:56,396 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 19:34:56,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:34:56,397 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:56,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 19:34:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2022-04-06 19:34:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 211 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 262 transitions. [2022-04-06 19:34:56,520 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 262 transitions. Word has length 68 [2022-04-06 19:34:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:56,520 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 262 transitions. [2022-04-06 19:34:56,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 262 transitions. [2022-04-06 19:34:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:56,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:56,521 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:56,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 19:34:56,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:34:56,721 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 37 times [2022-04-06 19:34:56,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:56,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [949897198] [2022-04-06 19:34:56,722 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:56,722 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 38 times [2022-04-06 19:34:56,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:56,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38814445] [2022-04-06 19:34:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:57,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-06 19:34:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:57,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38814445] [2022-04-06 19:34:57,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38814445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:57,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024330616] [2022-04-06 19:34:57,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:57,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:57,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:57,057 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:57,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:34:57,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:34:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:57,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:57,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:57,546 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:57,546 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 13 [2022-04-06 19:34:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:57,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024330616] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:57,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:57,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 25 [2022-04-06 19:34:57,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:57,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [949897198] [2022-04-06 19:34:57,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [949897198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:57,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:57,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:34:57,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130609161] [2022-04-06 19:34:57,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:57,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:34:57,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:57,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:34:57,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:34:57,587 INFO L87 Difference]: Start difference. First operand 216 states and 262 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:58,182 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2022-04-06 19:34:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:58,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 19:34:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:58,183 INFO L225 Difference]: With dead ends: 351 [2022-04-06 19:34:58,183 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 19:34:58,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:34:58,184 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 70 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:58,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 19:34:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 195. [2022-04-06 19:34:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-04-06 19:34:58,291 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 68 [2022-04-06 19:34:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:58,291 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-04-06 19:34:58,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-04-06 19:34:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 19:34:58,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:58,292 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:58,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:58,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:58,494 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 39 times [2022-04-06 19:34:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:58,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159562252] [2022-04-06 19:34:58,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:58,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:58,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 40 times [2022-04-06 19:34:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625926570] [2022-04-06 19:34:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:58,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625926570] [2022-04-06 19:34:58,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625926570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:58,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066005999] [2022-04-06 19:34:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:58,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:58,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:58,649 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:58,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:34:58,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:58,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:58,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:34:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:58,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:58,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:59,004 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-04-06 19:34:59,004 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 13 [2022-04-06 19:34:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 19:34:59,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066005999] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:59,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:59,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2022-04-06 19:34:59,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159562252] [2022-04-06 19:34:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159562252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:59,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:59,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:34:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060809896] [2022-04-06 19:34:59,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:59,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:34:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:34:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:34:59,035 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:59,371 INFO L93 Difference]: Finished difference Result 335 states and 415 transitions. [2022-04-06 19:34:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:34:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 68 [2022-04-06 19:34:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:59,373 INFO L225 Difference]: With dead ends: 335 [2022-04-06 19:34:59,373 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 19:34:59,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:34:59,373 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:59,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 46 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 19:34:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 197. [2022-04-06 19:34:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 192 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2022-04-06 19:34:59,494 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 68 [2022-04-06 19:34:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:59,494 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2022-04-06 19:34:59,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2022-04-06 19:34:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:34:59,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:59,495 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:59,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 19:34:59,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:34:59,712 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 1 times [2022-04-06 19:34:59,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:59,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731177633] [2022-04-06 19:34:59,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:59,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 2 times [2022-04-06 19:34:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:59,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313409075] [2022-04-06 19:34:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:34:59,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313409075] [2022-04-06 19:34:59,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313409075] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:59,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023995089] [2022-04-06 19:34:59,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:59,837 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:59,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:35:00,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:00,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:35:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:00,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-04-06 19:35:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-04-06 19:35:00,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 19:35:00,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023995089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:00,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:00,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 11] total 26 [2022-04-06 19:35:00,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:00,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731177633] [2022-04-06 19:35:00,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731177633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:00,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:00,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:35:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391823627] [2022-04-06 19:35:00,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:00,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:35:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:35:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:35:00,530 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:01,081 INFO L93 Difference]: Finished difference Result 288 states and 365 transitions. [2022-04-06 19:35:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:35:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 19:35:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:01,083 INFO L225 Difference]: With dead ends: 288 [2022-04-06 19:35:01,083 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 19:35:01,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:01,083 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 145 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:01,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 111 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 19:35:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 203. [2022-04-06 19:35:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 198 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 250 transitions. [2022-04-06 19:35:01,215 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 250 transitions. Word has length 69 [2022-04-06 19:35:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:01,217 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 250 transitions. [2022-04-06 19:35:01,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 250 transitions. [2022-04-06 19:35:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:35:01,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:01,217 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:01,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 19:35:01,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:01,431 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 3 times [2022-04-06 19:35:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:01,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574925534] [2022-04-06 19:35:01,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:01,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 4 times [2022-04-06 19:35:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:01,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422980021] [2022-04-06 19:35:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:01,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 19:35:01,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422980021] [2022-04-06 19:35:01,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422980021] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:01,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076198983] [2022-04-06 19:35:01,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:01,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:01,553 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:01,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:35:01,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 19:35:01,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-04-06 19:35:01,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:01,963 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-04-06 19:35:01,963 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 26 treesize of output 8 [2022-04-06 19:35:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-04-06 19:35:02,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076198983] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:02,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:02,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 9] total 25 [2022-04-06 19:35:02,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574925534] [2022-04-06 19:35:02,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574925534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:02,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:02,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:35:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183511785] [2022-04-06 19:35:02,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:02,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:35:02,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:35:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:35:02,042 INFO L87 Difference]: Start difference. First operand 203 states and 250 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:02,553 INFO L93 Difference]: Finished difference Result 387 states and 486 transitions. [2022-04-06 19:35:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:35:02,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 19:35:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:02,554 INFO L225 Difference]: With dead ends: 387 [2022-04-06 19:35:02,554 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 19:35:02,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:02,555 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:02,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 93 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 19:35:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2022-04-06 19:35:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.2352941176470589) internal successors, (252), 204 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 256 transitions. [2022-04-06 19:35:02,681 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 256 transitions. Word has length 72 [2022-04-06 19:35:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:02,681 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 256 transitions. [2022-04-06 19:35:02,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 256 transitions. [2022-04-06 19:35:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:35:02,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:02,682 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:02,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:02,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:02,895 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 5 times [2022-04-06 19:35:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227536493] [2022-04-06 19:35:02,897 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:02,897 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 6 times [2022-04-06 19:35:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18665568] [2022-04-06 19:35:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:02,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 19:35:02,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:02,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18665568] [2022-04-06 19:35:02,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18665568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:02,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446251095] [2022-04-06 19:35:02,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:02,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:02,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:02,964 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:02,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:35:03,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:35:03,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:03,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:35:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:03,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-04-06 19:35:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-04-06 19:35:03,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-06 19:35:03,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446251095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:03,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:03,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-04-06 19:35:03,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227536493] [2022-04-06 19:35:03,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227536493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:03,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:03,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:35:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119408086] [2022-04-06 19:35:03,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:03,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:35:03,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:35:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:35:03,394 INFO L87 Difference]: Start difference. First operand 209 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:04,156 INFO L93 Difference]: Finished difference Result 921 states and 1158 transitions. [2022-04-06 19:35:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:35:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 19:35:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:04,158 INFO L225 Difference]: With dead ends: 921 [2022-04-06 19:35:04,159 INFO L226 Difference]: Without dead ends: 847 [2022-04-06 19:35:04,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:35:04,159 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:04,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 51 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:35:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-04-06 19:35:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 215. [2022-04-06 19:35:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2380952380952381) internal successors, (260), 210 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 264 transitions. [2022-04-06 19:35:04,303 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 264 transitions. Word has length 75 [2022-04-06 19:35:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:04,303 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 264 transitions. [2022-04-06 19:35:04,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 264 transitions. [2022-04-06 19:35:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:35:04,304 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:04,304 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:04,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:04,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 19:35:04,519 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 7 times [2022-04-06 19:35:04,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529356113] [2022-04-06 19:35:04,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:04,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 8 times [2022-04-06 19:35:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:04,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149782694] [2022-04-06 19:35:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:04,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 19:35:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:04,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149782694] [2022-04-06 19:35:04,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149782694] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808252564] [2022-04-06 19:35:04,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:04,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:04,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:04,596 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:04,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:35:04,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:35:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:05,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 19:35:05,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:05,222 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:35:05,222 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 22 treesize of output 13 [2022-04-06 19:35:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 19:35:05,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808252564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:05,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:05,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2022-04-06 19:35:05,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529356113] [2022-04-06 19:35:05,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529356113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:05,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:05,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:35:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183847409] [2022-04-06 19:35:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:05,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:35:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:35:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:35:05,287 INFO L87 Difference]: Start difference. First operand 215 states and 264 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:06,188 INFO L93 Difference]: Finished difference Result 954 states and 1201 transitions. [2022-04-06 19:35:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:35:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 19:35:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:06,191 INFO L225 Difference]: With dead ends: 954 [2022-04-06 19:35:06,191 INFO L226 Difference]: Without dead ends: 880 [2022-04-06 19:35:06,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:35:06,192 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:06,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:35:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-04-06 19:35:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 217. [2022-04-06 19:35:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.240566037735849) internal successors, (263), 212 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 267 transitions. [2022-04-06 19:35:06,342 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 267 transitions. Word has length 79 [2022-04-06 19:35:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:06,342 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 267 transitions. [2022-04-06 19:35:06,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 267 transitions. [2022-04-06 19:35:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:35:06,343 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:06,343 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:06,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:06,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 19:35:06,560 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 9 times [2022-04-06 19:35:06,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86848170] [2022-04-06 19:35:06,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:06,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 10 times [2022-04-06 19:35:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208803205] [2022-04-06 19:35:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:06,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 19:35:06,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:06,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208803205] [2022-04-06 19:35:06,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208803205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:06,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389052578] [2022-04-06 19:35:06,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:06,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:06,639 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:06,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:35:06,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:35:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:07,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 19:35:07,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:07,232 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:35:07,233 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 22 treesize of output 13 [2022-04-06 19:35:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 19:35:07,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389052578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:07,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:07,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2022-04-06 19:35:07,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:07,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86848170] [2022-04-06 19:35:07,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86848170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:07,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:07,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:35:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33270306] [2022-04-06 19:35:07,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:07,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:35:07,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:35:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:35:07,290 INFO L87 Difference]: Start difference. First operand 217 states and 267 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:08,443 INFO L93 Difference]: Finished difference Result 1130 states and 1424 transitions. [2022-04-06 19:35:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:35:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:35:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:08,446 INFO L225 Difference]: With dead ends: 1130 [2022-04-06 19:35:08,446 INFO L226 Difference]: Without dead ends: 1056 [2022-04-06 19:35:08,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:35:08,447 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:08,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 128 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-04-06 19:35:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 219. [2022-04-06 19:35:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.2429906542056075) internal successors, (266), 214 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 270 transitions. [2022-04-06 19:35:08,601 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 270 transitions. Word has length 81 [2022-04-06 19:35:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:08,601 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 270 transitions. [2022-04-06 19:35:08,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 270 transitions. [2022-04-06 19:35:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:35:08,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:08,602 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:08,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 19:35:08,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:35:08,803 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 11 times [2022-04-06 19:35:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [375936539] [2022-04-06 19:35:08,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:08,804 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 12 times [2022-04-06 19:35:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:08,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225673702] [2022-04-06 19:35:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-04-06 19:35:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225673702] [2022-04-06 19:35:08,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225673702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:08,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906690023] [2022-04-06 19:35:08,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:08,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:08,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:08,896 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:08,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:35:09,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:35:09,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 19:35:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-04-06 19:35:09,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:35:09,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906690023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:09,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:35:09,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-04-06 19:35:09,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:09,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [375936539] [2022-04-06 19:35:09,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [375936539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:09,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:09,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:35:09,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901721755] [2022-04-06 19:35:09,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:09,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:35:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:35:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:35:09,288 INFO L87 Difference]: Start difference. First operand 219 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:09,570 INFO L93 Difference]: Finished difference Result 374 states and 462 transitions. [2022-04-06 19:35:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:35:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 83 [2022-04-06 19:35:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:09,571 INFO L225 Difference]: With dead ends: 374 [2022-04-06 19:35:09,571 INFO L226 Difference]: Without dead ends: 298 [2022-04-06 19:35:09,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:35:09,573 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:09,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-04-06 19:35:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-04-06 19:35:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2022-04-06 19:35:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2341463414634146) internal successors, (253), 205 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 257 transitions. [2022-04-06 19:35:09,744 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 257 transitions. Word has length 83 [2022-04-06 19:35:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:09,744 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 257 transitions. [2022-04-06 19:35:09,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 257 transitions. [2022-04-06 19:35:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:09,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:09,745 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:09,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:09,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:09,945 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash -485839224, now seen corresponding path program 1 times [2022-04-06 19:35:09,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:09,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479115120] [2022-04-06 19:35:09,947 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:09,947 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -485839224, now seen corresponding path program 2 times [2022-04-06 19:35:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:09,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066474376] [2022-04-06 19:35:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:10,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:35:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:10,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066474376] [2022-04-06 19:35:10,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066474376] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:10,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230907199] [2022-04-06 19:35:10,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:10,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:10,306 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:10,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:35:10,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:35:10,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:11,042 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:35:11,042 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 38 treesize of output 14 [2022-04-06 19:35:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:11,452 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:35:11,452 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 56 treesize of output 110 [2022-04-06 19:35:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:11,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230907199] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:11,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:11,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-04-06 19:35:11,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:11,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479115120] [2022-04-06 19:35:11,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479115120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:11,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:11,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:35:11,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492315085] [2022-04-06 19:35:11,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:11,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:35:11,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:35:11,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:35:11,689 INFO L87 Difference]: Start difference. First operand 210 states and 257 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:12,709 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-04-06 19:35:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:35:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:12,710 INFO L225 Difference]: With dead ends: 265 [2022-04-06 19:35:12,710 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 19:35:12,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:35:12,712 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 139 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:12,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 113 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:35:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 19:35:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-04-06 19:35:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.2363636363636363) internal successors, (272), 220 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2022-04-06 19:35:12,889 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 102 [2022-04-06 19:35:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:12,889 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2022-04-06 19:35:12,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2022-04-06 19:35:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:12,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:12,890 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:12,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 19:35:13,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:35:13,096 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -878866234, now seen corresponding path program 1 times [2022-04-06 19:35:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432781406] [2022-04-06 19:35:13,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:13,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash -878866234, now seen corresponding path program 2 times [2022-04-06 19:35:13,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:13,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963359349] [2022-04-06 19:35:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:13,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:13,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 26 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-04-06 19:35:13,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963359349] [2022-04-06 19:35:13,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963359349] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156300709] [2022-04-06 19:35:13,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:13,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:13,358 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:13,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 19:35:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:35:13,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:14,094 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:35:14,094 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 38 treesize of output 14 [2022-04-06 19:35:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:14,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:14,459 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:35:14,460 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 56 treesize of output 110 [2022-04-06 19:35:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:14,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156300709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:14,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:14,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-04-06 19:35:14,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432781406] [2022-04-06 19:35:14,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432781406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:14,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:14,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:35:14,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433632687] [2022-04-06 19:35:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:14,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:35:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:35:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:14,637 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:15,255 INFO L93 Difference]: Finished difference Result 283 states and 350 transitions. [2022-04-06 19:35:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:35:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:15,257 INFO L225 Difference]: With dead ends: 283 [2022-04-06 19:35:15,257 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 19:35:15,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:35:15,257 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:15,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:35:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 19:35:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-04-06 19:35:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2331838565022422) internal successors, (275), 223 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2022-04-06 19:35:15,455 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 102 [2022-04-06 19:35:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:15,455 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2022-04-06 19:35:15,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2022-04-06 19:35:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:15,456 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:15,456 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:15,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 19:35:15,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 19:35:15,657 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash -345290614, now seen corresponding path program 3 times [2022-04-06 19:35:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:15,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746565200] [2022-04-06 19:35:15,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:15,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -345290614, now seen corresponding path program 4 times [2022-04-06 19:35:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:15,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746792782] [2022-04-06 19:35:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:35:15,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746792782] [2022-04-06 19:35:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746792782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967808912] [2022-04-06 19:35:15,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:15,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:15,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:15,993 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:15,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 19:35:16,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:35:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:16,667 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:35:16,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:35:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:16,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:17,059 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:35:17,060 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 36 treesize of output 81 [2022-04-06 19:35:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:17,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967808912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:17,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:17,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 38 [2022-04-06 19:35:17,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:17,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746565200] [2022-04-06 19:35:17,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746565200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:17,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:17,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:35:17,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077152809] [2022-04-06 19:35:17,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:17,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:35:17,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:35:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:35:17,186 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:18,183 INFO L93 Difference]: Finished difference Result 301 states and 372 transitions. [2022-04-06 19:35:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:35:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:18,185 INFO L225 Difference]: With dead ends: 301 [2022-04-06 19:35:18,185 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 19:35:18,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:35:18,185 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:18,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 110 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:35:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 19:35:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2022-04-06 19:35:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2331838565022422) internal successors, (275), 223 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2022-04-06 19:35:18,358 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 102 [2022-04-06 19:35:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:18,358 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2022-04-06 19:35:18,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2022-04-06 19:35:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:18,359 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:18,359 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:18,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:18,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:18,563 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -738317624, now seen corresponding path program 5 times [2022-04-06 19:35:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107028860] [2022-04-06 19:35:18,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:18,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash -738317624, now seen corresponding path program 6 times [2022-04-06 19:35:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084814682] [2022-04-06 19:35:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:18,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:35:18,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084814682] [2022-04-06 19:35:18,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084814682] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688425915] [2022-04-06 19:35:18,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:18,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:18,902 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:18,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 19:35:19,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:35:19,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:19,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:35:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:35:22,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:35:22,348 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-04-06 19:35:22,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 28 [2022-04-06 19:35:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 110 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:35:22,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:24,801 INFO L356 Elim1Store]: treesize reduction 166, result has 26.2 percent of original size [2022-04-06 19:35:24,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 74 [2022-04-06 19:35:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:35:24,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688425915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:24,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:24,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 57 [2022-04-06 19:35:24,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107028860] [2022-04-06 19:35:24,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107028860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:24,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:24,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:35:24,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993242437] [2022-04-06 19:35:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:24,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:35:24,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:24,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:35:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:35:24,913 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:25,870 INFO L93 Difference]: Finished difference Result 298 states and 368 transitions. [2022-04-06 19:35:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:35:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:25,871 INFO L225 Difference]: With dead ends: 298 [2022-04-06 19:35:25,871 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 19:35:25,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=624, Invalid=4206, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:35:25,872 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:25,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 96 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:35:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 19:35:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-04-06 19:35:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2340425531914894) internal successors, (290), 235 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 294 transitions. [2022-04-06 19:35:26,057 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 294 transitions. Word has length 102 [2022-04-06 19:35:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:26,058 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 294 transitions. [2022-04-06 19:35:26,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 294 transitions. [2022-04-06 19:35:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:26,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:26,059 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:26,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 19:35:26,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 19:35:26,262 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:26,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1325123638, now seen corresponding path program 7 times [2022-04-06 19:35:26,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:26,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1596561224] [2022-04-06 19:35:26,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:26,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1325123638, now seen corresponding path program 8 times [2022-04-06 19:35:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:26,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511190763] [2022-04-06 19:35:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:26,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-04-06 19:35:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511190763] [2022-04-06 19:35:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511190763] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655570690] [2022-04-06 19:35:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:26,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:26,655 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:26,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 19:35:26,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:26,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:35:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:27,377 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:35:27,378 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 38 treesize of output 14 [2022-04-06 19:35:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:27,763 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:35:27,763 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 56 treesize of output 110 [2022-04-06 19:35:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:27,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655570690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:27,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:27,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2022-04-06 19:35:27,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1596561224] [2022-04-06 19:35:27,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1596561224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:27,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:27,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:35:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395631553] [2022-04-06 19:35:27,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:27,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:35:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:35:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:35:27,901 INFO L87 Difference]: Start difference. First operand 240 states and 294 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:28,777 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-04-06 19:35:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:35:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:28,778 INFO L225 Difference]: With dead ends: 321 [2022-04-06 19:35:28,778 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 19:35:28,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:35:28,779 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:28,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 89 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:35:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 19:35:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2022-04-06 19:35:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2254098360655739) internal successors, (299), 244 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 303 transitions. [2022-04-06 19:35:28,985 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 303 transitions. Word has length 102 [2022-04-06 19:35:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:28,985 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 303 transitions. [2022-04-06 19:35:28,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 303 transitions. [2022-04-06 19:35:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:28,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:28,986 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:29,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 19:35:29,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:29,193 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1948775304, now seen corresponding path program 9 times [2022-04-06 19:35:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:29,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096268990] [2022-04-06 19:35:29,194 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:29,194 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:29,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1948775304, now seen corresponding path program 10 times [2022-04-06 19:35:29,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:29,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873738630] [2022-04-06 19:35:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 19:35:29,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873738630] [2022-04-06 19:35:29,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873738630] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904233176] [2022-04-06 19:35:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:29,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:29,501 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:29,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 19:35:29,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:35:29,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:30,134 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:35:30,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:35:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:30,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:30,456 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:35:30,457 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 36 treesize of output 81 [2022-04-06 19:35:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:30,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904233176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:30,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:30,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-04-06 19:35:30,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096268990] [2022-04-06 19:35:30,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096268990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:30,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:30,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:35:30,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449168212] [2022-04-06 19:35:30,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:30,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:35:30,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:35:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:30,583 INFO L87 Difference]: Start difference. First operand 249 states and 303 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:31,375 INFO L93 Difference]: Finished difference Result 339 states and 414 transitions. [2022-04-06 19:35:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:35:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:31,376 INFO L225 Difference]: With dead ends: 339 [2022-04-06 19:35:31,376 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 19:35:31,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:35:31,377 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 111 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:31,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 77 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 19:35:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2022-04-06 19:35:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2173913043478262) internal successors, (308), 253 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 312 transitions. [2022-04-06 19:35:31,583 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 312 transitions. Word has length 102 [2022-04-06 19:35:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:31,583 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 312 transitions. [2022-04-06 19:35:31,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 312 transitions. [2022-04-06 19:35:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:31,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:31,584 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:31,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:31,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 19:35:31,789 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1280899916, now seen corresponding path program 11 times [2022-04-06 19:35:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:31,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121701524] [2022-04-06 19:35:31,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:31,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1280899916, now seen corresponding path program 12 times [2022-04-06 19:35:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403178011] [2022-04-06 19:35:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:32,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-04-06 19:35:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403178011] [2022-04-06 19:35:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403178011] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127995323] [2022-04-06 19:35:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:32,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:32,112 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:32,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 19:35:32,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:35:32,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 19:35:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:35:33,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:35:33,524 INFO L356 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2022-04-06 19:35:33,524 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 59 treesize of output 44 [2022-04-06 19:35:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 82 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-04-06 19:35:33,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:34,820 INFO L356 Elim1Store]: treesize reduction 116, result has 52.7 percent of original size [2022-04-06 19:35:34,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 144 [2022-04-06 19:35:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 131 proven. 38 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-04-06 19:35:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127995323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:36,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:36,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 51 [2022-04-06 19:35:36,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121701524] [2022-04-06 19:35:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121701524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:36,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:36,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:35:36,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708680273] [2022-04-06 19:35:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:36,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:35:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:35:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:35:36,917 INFO L87 Difference]: Start difference. First operand 258 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:37,836 INFO L93 Difference]: Finished difference Result 357 states and 432 transitions. [2022-04-06 19:35:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:35:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:37,837 INFO L225 Difference]: With dead ends: 357 [2022-04-06 19:35:37,837 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 19:35:37,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:35:37,838 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 111 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:37,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 90 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:35:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 19:35:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2022-04-06 19:35:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2173913043478262) internal successors, (308), 253 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 312 transitions. [2022-04-06 19:35:38,043 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 312 transitions. Word has length 102 [2022-04-06 19:35:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:38,043 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 312 transitions. [2022-04-06 19:35:38,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 312 transitions. [2022-04-06 19:35:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:38,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:38,044 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:38,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 19:35:38,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 19:35:38,245 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 259831562, now seen corresponding path program 13 times [2022-04-06 19:35:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:38,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156540376] [2022-04-06 19:35:38,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:38,246 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash 259831562, now seen corresponding path program 14 times [2022-04-06 19:35:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:38,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470011538] [2022-04-06 19:35:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:38,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:38,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-04-06 19:35:38,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470011538] [2022-04-06 19:35:38,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470011538] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173340914] [2022-04-06 19:35:38,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:38,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:38,574 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:38,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 19:35:38,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:38,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:35:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:39,293 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:35:39,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:35:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:39,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:39,679 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:35:39,680 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 56 treesize of output 110 [2022-04-06 19:35:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:39,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173340914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:39,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:39,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-04-06 19:35:39,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156540376] [2022-04-06 19:35:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156540376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:39,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:39,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:35:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436958933] [2022-04-06 19:35:39,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:39,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:35:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:35:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:39,821 INFO L87 Difference]: Start difference. First operand 258 states and 312 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:40,492 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2022-04-06 19:35:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:35:40,492 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 102 [2022-04-06 19:35:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:40,493 INFO L225 Difference]: With dead ends: 342 [2022-04-06 19:35:40,493 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 19:35:40,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:35:40,494 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:40,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 82 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 19:35:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-04-06 19:35:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.216) internal successors, (304), 250 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 308 transitions. [2022-04-06 19:35:40,696 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 308 transitions. Word has length 102 [2022-04-06 19:35:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:40,696 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 308 transitions. [2022-04-06 19:35:40,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 308 transitions. [2022-04-06 19:35:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:40,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:40,697 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:40,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:40,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:40,901 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:40,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2127337274, now seen corresponding path program 15 times [2022-04-06 19:35:40,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:40,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347486414] [2022-04-06 19:35:40,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:40,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2127337274, now seen corresponding path program 16 times [2022-04-06 19:35:40,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:40,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051077178] [2022-04-06 19:35:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:41,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 19:35:41,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051077178] [2022-04-06 19:35:41,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051077178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712980478] [2022-04-06 19:35:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:41,212 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:41,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 19:35:41,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:35:41,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:41,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:35:41,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:35:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:35:41,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:42,226 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:35:42,227 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 36 treesize of output 81 [2022-04-06 19:35:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:35:42,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712980478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:42,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:42,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-04-06 19:35:42,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:42,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347486414] [2022-04-06 19:35:42,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347486414] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:42,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:42,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:35:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302730704] [2022-04-06 19:35:42,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:42,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:35:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:35:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:42,344 INFO L87 Difference]: Start difference. First operand 255 states and 308 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:43,056 INFO L93 Difference]: Finished difference Result 336 states and 406 transitions. [2022-04-06 19:35:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:35:43,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:35:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:43,057 INFO L225 Difference]: With dead ends: 336 [2022-04-06 19:35:43,057 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 19:35:43,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:35:43,058 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:43,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 87 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 19:35:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-04-06 19:35:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.214574898785425) internal successors, (300), 247 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 304 transitions. [2022-04-06 19:35:43,264 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 304 transitions. Word has length 102 [2022-04-06 19:35:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:43,264 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 304 transitions. [2022-04-06 19:35:43,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 304 transitions. [2022-04-06 19:35:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:35:43,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:43,265 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:43,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:43,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:43,482 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1499754634, now seen corresponding path program 17 times [2022-04-06 19:35:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294217791] [2022-04-06 19:35:43,483 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:43,483 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1499754634, now seen corresponding path program 18 times [2022-04-06 19:35:43,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:43,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937082569] [2022-04-06 19:35:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:43,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-04-06 19:35:43,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937082569] [2022-04-06 19:35:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937082569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749114954] [2022-04-06 19:35:43,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:43,818 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:43,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 19:35:44,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:35:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 19:35:44,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:44,573 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 9 treesize of output 3 [2022-04-06 19:36:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:05,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:05,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:36:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:05,570 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 19:36:05,570 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 69 treesize of output 24 [2022-04-06 19:36:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 87 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-04-06 19:36:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 128 proven. 75 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 19:36:13,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749114954] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:13,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:13,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31, 32] total 74 [2022-04-06 19:36:13,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294217791] [2022-04-06 19:36:13,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294217791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:13,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:13,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:36:13,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309720334] [2022-04-06 19:36:13,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:13,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:36:13,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:13,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:36:13,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=4583, Unknown=15, NotChecked=0, Total=5402 [2022-04-06 19:36:13,812 INFO L87 Difference]: Start difference. First operand 252 states and 304 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:14,818 INFO L93 Difference]: Finished difference Result 333 states and 401 transitions. [2022-04-06 19:36:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:36:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:14,819 INFO L225 Difference]: With dead ends: 333 [2022-04-06 19:36:14,819 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 19:36:14,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=978, Invalid=6317, Unknown=15, NotChecked=0, Total=7310 [2022-04-06 19:36:14,820 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:14,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 76 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:36:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 19:36:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-04-06 19:36:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 247 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 303 transitions. [2022-04-06 19:36:15,022 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 303 transitions. Word has length 102 [2022-04-06 19:36:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:15,022 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 303 transitions. [2022-04-06 19:36:15,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 303 transitions. [2022-04-06 19:36:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:15,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:15,023 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:15,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:15,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:15,224 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash 478686280, now seen corresponding path program 19 times [2022-04-06 19:36:15,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:15,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1164930025] [2022-04-06 19:36:15,225 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:15,225 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash 478686280, now seen corresponding path program 20 times [2022-04-06 19:36:15,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:15,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102293819] [2022-04-06 19:36:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:15,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-04-06 19:36:15,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102293819] [2022-04-06 19:36:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102293819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101489831] [2022-04-06 19:36:15,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:15,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:15,556 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:15,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 19:36:15,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:36:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:16,275 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:36:16,275 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 38 treesize of output 14 [2022-04-06 19:36:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:16,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:16,653 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:36:16,653 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 56 treesize of output 110 [2022-04-06 19:36:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101489831] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:16,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 33 [2022-04-06 19:36:16,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1164930025] [2022-04-06 19:36:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1164930025] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:16,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:36:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395037644] [2022-04-06 19:36:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:16,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:36:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:36:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:36:16,805 INFO L87 Difference]: Start difference. First operand 252 states and 303 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:17,371 INFO L93 Difference]: Finished difference Result 340 states and 408 transitions. [2022-04-06 19:36:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:36:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:17,372 INFO L225 Difference]: With dead ends: 340 [2022-04-06 19:36:17,372 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 19:36:17,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:36:17,373 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:17,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:36:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 19:36:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-04-06 19:36:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.209486166007905) internal successors, (306), 253 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 310 transitions. [2022-04-06 19:36:17,586 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 310 transitions. Word has length 102 [2022-04-06 19:36:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:17,586 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 310 transitions. [2022-04-06 19:36:17,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 310 transitions. [2022-04-06 19:36:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:17,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:17,587 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:17,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:17,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 19:36:17,803 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash 196615876, now seen corresponding path program 21 times [2022-04-06 19:36:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:17,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008868468] [2022-04-06 19:36:17,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:17,804 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 196615876, now seen corresponding path program 22 times [2022-04-06 19:36:17,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:17,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996676562] [2022-04-06 19:36:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:17,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:18,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:36:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996676562] [2022-04-06 19:36:18,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996676562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813140181] [2022-04-06 19:36:18,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:18,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:18,109 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:18,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 19:36:18,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:18,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:36:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:18,777 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:18,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:36:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:18,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:19,125 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:36:19,125 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 36 treesize of output 81 [2022-04-06 19:36:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:19,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813140181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:19,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:19,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-04-06 19:36:19,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:19,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008868468] [2022-04-06 19:36:19,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008868468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:19,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:19,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:36:19,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40448987] [2022-04-06 19:36:19,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:19,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:36:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:36:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:36:19,242 INFO L87 Difference]: Start difference. First operand 258 states and 310 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:20,185 INFO L93 Difference]: Finished difference Result 346 states and 414 transitions. [2022-04-06 19:36:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:36:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:20,186 INFO L225 Difference]: With dead ends: 346 [2022-04-06 19:36:20,186 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 19:36:20,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=2301, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:36:20,187 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:20,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 95 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:36:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 19:36:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2022-04-06 19:36:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2131147540983607) internal successors, (296), 244 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2022-04-06 19:36:20,383 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 102 [2022-04-06 19:36:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:20,384 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2022-04-06 19:36:20,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2022-04-06 19:36:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:20,384 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:20,384 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:20,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:20,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 19:36:20,602 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash -390190138, now seen corresponding path program 23 times [2022-04-06 19:36:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:20,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135391334] [2022-04-06 19:36:20,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:20,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:20,603 INFO L85 PathProgramCache]: Analyzing trace with hash -390190138, now seen corresponding path program 24 times [2022-04-06 19:36:20,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:20,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896343594] [2022-04-06 19:36:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:20,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:20,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-04-06 19:36:20,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896343594] [2022-04-06 19:36:20,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896343594] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:20,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696896846] [2022-04-06 19:36:20,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:20,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:20,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:20,901 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:20,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 19:36:21,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:36:21,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 19:36:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:22,370 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-04-06 19:36:22,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2022-04-06 19:36:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:36:22,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:23,424 INFO L356 Elim1Store]: treesize reduction 122, result has 52.2 percent of original size [2022-04-06 19:36:23,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 148 [2022-04-06 19:36:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:36:26,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696896846] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:26,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:26,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 49 [2022-04-06 19:36:26,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:26,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135391334] [2022-04-06 19:36:26,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135391334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:26,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:26,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:36:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534356966] [2022-04-06 19:36:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:26,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:36:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:36:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2114, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:36:26,990 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:27,759 INFO L93 Difference]: Finished difference Result 327 states and 393 transitions. [2022-04-06 19:36:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:36:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:27,760 INFO L225 Difference]: With dead ends: 327 [2022-04-06 19:36:27,760 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 19:36:27,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=328, Invalid=3094, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:36:27,761 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:27,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 69 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:36:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 19:36:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-04-06 19:36:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.209016393442623) internal successors, (295), 244 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 299 transitions. [2022-04-06 19:36:27,961 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 299 transitions. Word has length 102 [2022-04-06 19:36:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:27,962 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 299 transitions. [2022-04-06 19:36:27,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 299 transitions. [2022-04-06 19:36:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:27,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:27,962 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:27,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:28,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:28,163 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:28,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1517608322, now seen corresponding path program 25 times [2022-04-06 19:36:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:28,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72902647] [2022-04-06 19:36:28,164 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:28,164 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1517608322, now seen corresponding path program 26 times [2022-04-06 19:36:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:28,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394257885] [2022-04-06 19:36:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 19:36:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394257885] [2022-04-06 19:36:28,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394257885] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:28,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669865650] [2022-04-06 19:36:28,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:28,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:28,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:28,484 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:28,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 19:36:28,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:36:28,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:29,202 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:36:29,202 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 38 treesize of output 14 [2022-04-06 19:36:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:29,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:29,575 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:36:29,575 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 56 treesize of output 110 [2022-04-06 19:36:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:29,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669865650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:29,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:29,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-04-06 19:36:29,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72902647] [2022-04-06 19:36:29,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72902647] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:29,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:29,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:36:29,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385014579] [2022-04-06 19:36:29,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:29,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:36:29,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:36:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:36:29,710 INFO L87 Difference]: Start difference. First operand 249 states and 299 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:30,458 INFO L93 Difference]: Finished difference Result 327 states and 391 transitions. [2022-04-06 19:36:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:36:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:30,459 INFO L225 Difference]: With dead ends: 327 [2022-04-06 19:36:30,459 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 19:36:30,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:36:30,460 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:30,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 70 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:36:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 19:36:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-04-06 19:36:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 244 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2022-04-06 19:36:30,655 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 102 [2022-04-06 19:36:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:30,656 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2022-04-06 19:36:30,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2022-04-06 19:36:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:30,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:30,656 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:30,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:30,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:30,874 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash 849732934, now seen corresponding path program 27 times [2022-04-06 19:36:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:30,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [911289344] [2022-04-06 19:36:30,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:30,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash 849732934, now seen corresponding path program 28 times [2022-04-06 19:36:30,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:30,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449640551] [2022-04-06 19:36:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:30,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:31,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-04-06 19:36:31,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:31,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449640551] [2022-04-06 19:36:31,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449640551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:31,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760349702] [2022-04-06 19:36:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:31,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:31,215 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:31,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 19:36:31,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:31,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:36:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:31,857 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:31,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:36:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:31,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:32,187 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:36:32,187 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 36 treesize of output 81 [2022-04-06 19:36:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:32,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760349702] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:32,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:32,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 36 [2022-04-06 19:36:32,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:32,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [911289344] [2022-04-06 19:36:32,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [911289344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:32,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:32,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:36:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84767827] [2022-04-06 19:36:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:32,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:36:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:36:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:36:32,304 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:33,130 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2022-04-06 19:36:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:36:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:33,132 INFO L225 Difference]: With dead ends: 328 [2022-04-06 19:36:33,132 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 19:36:33,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:36:33,132 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 99 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:33,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 87 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:36:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 19:36:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-04-06 19:36:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-04-06 19:36:33,322 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-04-06 19:36:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:33,322 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-04-06 19:36:33,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-04-06 19:36:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:33,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:33,322 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:33,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 19:36:33,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:33,524 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash -171335420, now seen corresponding path program 29 times [2022-04-06 19:36:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:33,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [872949654] [2022-04-06 19:36:33,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:33,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash -171335420, now seen corresponding path program 30 times [2022-04-06 19:36:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345639517] [2022-04-06 19:36:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:33,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:33,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 26 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-04-06 19:36:33,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345639517] [2022-04-06 19:36:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345639517] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564142564] [2022-04-06 19:36:33,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:33,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:33,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:33,830 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:33,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 19:36:34,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:36:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:36:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:35,303 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-04-06 19:36:35,303 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 38 treesize of output 23 [2022-04-06 19:36:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 104 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:36:35,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:36,198 INFO L356 Elim1Store]: treesize reduction 114, result has 49.3 percent of original size [2022-04-06 19:36:36,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 126 [2022-04-06 19:36:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:36:36,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564142564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:36,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:36,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 20] total 49 [2022-04-06 19:36:36,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [872949654] [2022-04-06 19:36:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [872949654] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:36,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:36,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:36:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885476414] [2022-04-06 19:36:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:36,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:36:36,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:36:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:36:36,336 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:37,039 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-04-06 19:36:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:36:37,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 102 [2022-04-06 19:36:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:37,040 INFO L225 Difference]: With dead ends: 313 [2022-04-06 19:36:37,040 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 19:36:37,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=400, Invalid=2906, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:36:37,041 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:37,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 64 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:36:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 19:36:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-04-06 19:36:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-04-06 19:36:37,240 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-04-06 19:36:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:37,240 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-04-06 19:36:37,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-04-06 19:36:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:37,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:37,240 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:37,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:37,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:37,441 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 730191496, now seen corresponding path program 31 times [2022-04-06 19:36:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:37,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1215168970] [2022-04-06 19:36:37,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:37,442 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 730191496, now seen corresponding path program 32 times [2022-04-06 19:36:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:37,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385446989] [2022-04-06 19:36:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:37,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:37,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:36:37,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385446989] [2022-04-06 19:36:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385446989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074059680] [2022-04-06 19:36:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:37,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:37,736 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:37,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 19:36:37,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:37,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:37,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:36:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:38,489 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:36:38,489 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 38 treesize of output 14 [2022-04-06 19:36:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:38,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:38,882 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:36:38,883 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 56 treesize of output 110 [2022-04-06 19:36:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074059680] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:39,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:39,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-04-06 19:36:39,017 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:39,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1215168970] [2022-04-06 19:36:39,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1215168970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:39,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:39,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:36:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917702101] [2022-04-06 19:36:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:39,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:36:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:36:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:36:39,019 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:40,040 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2022-04-06 19:36:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:36:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:40,042 INFO L225 Difference]: With dead ends: 325 [2022-04-06 19:36:40,042 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 19:36:40,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:36:40,042 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 150 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:40,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 89 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:36:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 19:36:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2022-04-06 19:36:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 244 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2022-04-06 19:36:40,240 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 102 [2022-04-06 19:36:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:40,241 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2022-04-06 19:36:40,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2022-04-06 19:36:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:40,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:40,241 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:40,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 19:36:40,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 19:36:40,442 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 337164486, now seen corresponding path program 33 times [2022-04-06 19:36:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:40,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392468075] [2022-04-06 19:36:40,443 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:40,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash 337164486, now seen corresponding path program 34 times [2022-04-06 19:36:40,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:40,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361320642] [2022-04-06 19:36:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:40,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:36:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:40,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361320642] [2022-04-06 19:36:40,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361320642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:40,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514449009] [2022-04-06 19:36:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:40,754 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:40,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 19:36:40,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:40,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:36:40,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:41,426 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:41,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:36:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:41,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:41,782 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:36:41,782 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 36 treesize of output 81 [2022-04-06 19:36:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:41,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514449009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:41,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:41,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-04-06 19:36:41,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392468075] [2022-04-06 19:36:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392468075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:41,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:41,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:36:41,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533798677] [2022-04-06 19:36:41,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:41,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:36:41,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:36:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:36:41,896 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:42,828 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2022-04-06 19:36:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:36:42,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:42,830 INFO L225 Difference]: With dead ends: 328 [2022-04-06 19:36:42,830 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 19:36:42,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:36:42,830 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:42,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 107 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:36:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 19:36:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-04-06 19:36:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-04-06 19:36:43,025 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-04-06 19:36:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:43,026 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-04-06 19:36:43,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-04-06 19:36:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:43,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:43,026 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:43,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 19:36:43,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:43,227 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -249641528, now seen corresponding path program 35 times [2022-04-06 19:36:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013914185] [2022-04-06 19:36:43,228 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:43,228 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -249641528, now seen corresponding path program 36 times [2022-04-06 19:36:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:43,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961017220] [2022-04-06 19:36:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:43,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:43,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-04-06 19:36:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961017220] [2022-04-06 19:36:43,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961017220] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139876999] [2022-04-06 19:36:43,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:43,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:43,582 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:43,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 19:36:44,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:36:44,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:44,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:36:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:44,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-04-06 19:36:44,755 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-04-06 19:36:44,755 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 27 treesize of output 20 [2022-04-06 19:36:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 38 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:45,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139876999] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:45,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:45,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-04-06 19:36:45,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013914185] [2022-04-06 19:36:45,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013914185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:45,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:45,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:36:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388134837] [2022-04-06 19:36:45,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:45,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:36:45,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:36:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:36:45,109 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:45,827 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-04-06 19:36:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:36:45,827 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 102 [2022-04-06 19:36:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:45,828 INFO L225 Difference]: With dead ends: 313 [2022-04-06 19:36:45,828 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 19:36:45,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:36:45,828 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:45,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:36:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 19:36:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-04-06 19:36:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-04-06 19:36:46,027 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-04-06 19:36:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:46,027 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-04-06 19:36:46,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-04-06 19:36:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:46,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:46,028 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:46,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:46,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 19:36:46,229 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1656977340, now seen corresponding path program 37 times [2022-04-06 19:36:46,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:46,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479568023] [2022-04-06 19:36:46,230 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:46,230 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:46,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1656977340, now seen corresponding path program 38 times [2022-04-06 19:36:46,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:46,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160119814] [2022-04-06 19:36:46,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:46,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:46,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:36:46,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160119814] [2022-04-06 19:36:46,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160119814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009808646] [2022-04-06 19:36:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:46,542 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 19:36:46,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:46,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:36:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:47,297 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:36:47,297 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 38 treesize of output 14 [2022-04-06 19:36:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:47,677 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:36:47,678 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 56 treesize of output 110 [2022-04-06 19:36:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:47,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009808646] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:47,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:47,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-04-06 19:36:47,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [479568023] [2022-04-06 19:36:47,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [479568023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:47,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:47,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:36:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811372619] [2022-04-06 19:36:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:47,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:36:47,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:36:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:36:47,817 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:48,915 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2022-04-06 19:36:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:36:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:48,917 INFO L225 Difference]: With dead ends: 321 [2022-04-06 19:36:48,917 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 19:36:48,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=2486, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:36:48,918 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 187 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:48,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 111 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:36:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 19:36:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2022-04-06 19:36:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-04-06 19:36:49,112 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-04-06 19:36:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:49,112 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-04-06 19:36:49,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-04-06 19:36:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:49,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:49,112 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:49,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:49,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 19:36:49,313 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2050004350, now seen corresponding path program 39 times [2022-04-06 19:36:49,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:49,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944205013] [2022-04-06 19:36:49,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:49,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:49,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2050004350, now seen corresponding path program 40 times [2022-04-06 19:36:49,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:49,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097061557] [2022-04-06 19:36:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:49,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:36:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097061557] [2022-04-06 19:36:49,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097061557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483277548] [2022-04-06 19:36:49,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:49,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:49,644 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:49,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 19:36:49,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:36:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:50,306 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:50,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:36:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:36:50,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:50,653 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:36:50,654 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 36 treesize of output 81 [2022-04-06 19:36:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:36:50,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483277548] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:50,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:50,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-04-06 19:36:50,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:50,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944205013] [2022-04-06 19:36:50,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944205013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:50,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:50,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:36:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810853441] [2022-04-06 19:36:50,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:50,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:36:50,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:50,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:36:50,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:36:50,767 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:51,707 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-04-06 19:36:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:36:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:36:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:51,708 INFO L225 Difference]: With dead ends: 319 [2022-04-06 19:36:51,708 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 19:36:51,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=2299, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:36:51,709 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:51,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 110 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:36:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 19:36:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-04-06 19:36:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-04-06 19:36:51,912 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-04-06 19:36:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:51,912 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-04-06 19:36:51,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-04-06 19:36:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:36:51,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:51,913 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:51,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 19:36:52,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 19:36:52,116 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2051183942, now seen corresponding path program 41 times [2022-04-06 19:36:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240713922] [2022-04-06 19:36:52,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:52,117 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2051183942, now seen corresponding path program 42 times [2022-04-06 19:36:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:52,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714453367] [2022-04-06 19:36:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:52,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:52,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:36:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714453367] [2022-04-06 19:36:52,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714453367] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:52,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039285740] [2022-04-06 19:36:52,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:52,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:52,476 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:52,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 19:36:54,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:36:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 19:36:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 109 proven. 104 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-04-06 19:36:58,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:10,531 INFO L356 Elim1Store]: treesize reduction 326, result has 28.7 percent of original size [2022-04-06 19:37:10,531 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 115 treesize of output 153 [2022-04-06 19:37:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 53 proven. 142 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 19:37:10,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039285740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:10,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:10,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 31] total 73 [2022-04-06 19:37:10,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:10,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240713922] [2022-04-06 19:37:10,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240713922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:10,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:10,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:37:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210059580] [2022-04-06 19:37:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:10,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:37:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:37:10,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=4465, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:37:10,921 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:12,132 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-04-06 19:37:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:37:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:12,133 INFO L225 Difference]: With dead ends: 325 [2022-04-06 19:37:12,133 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 19:37:12,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1165, Invalid=6317, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 19:37:12,134 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 194 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:12,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 83 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:37:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 19:37:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-04-06 19:37:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-04-06 19:37:12,326 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-04-06 19:37:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:12,327 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-04-06 19:37:12,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-04-06 19:37:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:12,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:12,327 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:12,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:12,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 19:37:12,528 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1658156932, now seen corresponding path program 43 times [2022-04-06 19:37:12,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:12,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909932783] [2022-04-06 19:37:12,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:12,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:12,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1658156932, now seen corresponding path program 44 times [2022-04-06 19:37:12,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179117445] [2022-04-06 19:37:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:12,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:12,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 19:37:12,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179117445] [2022-04-06 19:37:12,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179117445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:12,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988298081] [2022-04-06 19:37:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:37:12,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:12,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:12,903 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:12,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 19:37:13,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:37:13,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:37:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:13,674 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:37:13,674 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 38 treesize of output 14 [2022-04-06 19:37:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:37:13,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:14,087 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:37:14,087 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 56 treesize of output 110 [2022-04-06 19:37:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:14,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988298081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:14,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:14,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2022-04-06 19:37:14,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909932783] [2022-04-06 19:37:14,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909932783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:14,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:14,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:37:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505138981] [2022-04-06 19:37:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:14,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:37:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:37:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:37:14,228 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:15,058 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-04-06 19:37:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:37:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:15,059 INFO L225 Difference]: With dead ends: 313 [2022-04-06 19:37:15,059 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 19:37:15,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:37:15,059 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:15,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 86 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:37:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 19:37:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-04-06 19:37:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-04-06 19:37:15,259 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-04-06 19:37:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:15,259 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-04-06 19:37:15,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-04-06 19:37:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:15,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:15,260 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:15,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:15,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:15,464 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1577087558, now seen corresponding path program 45 times [2022-04-06 19:37:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333321018] [2022-04-06 19:37:15,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:15,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:15,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1577087558, now seen corresponding path program 46 times [2022-04-06 19:37:15,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:15,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125586171] [2022-04-06 19:37:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:15,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:37:15,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125586171] [2022-04-06 19:37:15,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125586171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963206199] [2022-04-06 19:37:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:37:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:15,823 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:15,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 19:37:16,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:37:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:16,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:37:16,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:16,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:37:16,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:37:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:37:16,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:16,837 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:37:16,837 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 36 treesize of output 81 [2022-04-06 19:37:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:16,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963206199] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:16,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:16,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 12] total 37 [2022-04-06 19:37:16,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:16,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333321018] [2022-04-06 19:37:16,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333321018] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:16,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:16,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:37:16,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573467588] [2022-04-06 19:37:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:16,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:37:16,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:37:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:37:16,953 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:17,908 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-04-06 19:37:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:37:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:17,909 INFO L225 Difference]: With dead ends: 319 [2022-04-06 19:37:17,909 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 19:37:17,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:37:17,910 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 130 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:17,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 97 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:37:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 19:37:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-04-06 19:37:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-04-06 19:37:18,109 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-04-06 19:37:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:18,110 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-04-06 19:37:18,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-04-06 19:37:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:18,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:18,110 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:18,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:18,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:18,311 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1383308554, now seen corresponding path program 47 times [2022-04-06 19:37:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:18,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1582363487] [2022-04-06 19:37:18,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:18,312 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1383308554, now seen corresponding path program 48 times [2022-04-06 19:37:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529942819] [2022-04-06 19:37:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:18,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:37:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:18,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529942819] [2022-04-06 19:37:18,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529942819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:18,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672997599] [2022-04-06 19:37:18,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:37:18,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:18,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:18,611 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:18,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 19:37:19,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:37:19,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 19:37:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-04-06 19:37:20,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:21,880 INFO L356 Elim1Store]: treesize reduction 276, result has 39.6 percent of original size [2022-04-06 19:37:21,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 204 [2022-04-06 19:37:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 109 proven. 14 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 19:37:26,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672997599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:26,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:26,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2022-04-06 19:37:26,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1582363487] [2022-04-06 19:37:26,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1582363487] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:26,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:26,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:37:26,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251609527] [2022-04-06 19:37:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:26,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:37:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:37:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:37:26,230 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:27,387 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-04-06 19:37:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:37:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:27,388 INFO L225 Difference]: With dead ends: 325 [2022-04-06 19:37:27,388 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 19:37:27,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:37:27,389 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 204 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:27,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 86 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:37:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 19:37:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2022-04-06 19:37:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-04-06 19:37:27,586 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-04-06 19:37:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:27,586 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-04-06 19:37:27,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-04-06 19:37:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:27,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:27,587 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:27,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:27,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:27,788 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash 990281544, now seen corresponding path program 49 times [2022-04-06 19:37:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:27,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [68683993] [2022-04-06 19:37:27,789 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:27,789 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 990281544, now seen corresponding path program 50 times [2022-04-06 19:37:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:27,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521490459] [2022-04-06 19:37:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-04-06 19:37:28,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521490459] [2022-04-06 19:37:28,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521490459] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668973867] [2022-04-06 19:37:28,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:37:28,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:28,174 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:28,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 19:37:28,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:37:28,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:28,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:37:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:28,952 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:37:28,952 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 38 treesize of output 14 [2022-04-06 19:37:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:37:28,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:29,367 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:37:29,367 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 56 treesize of output 110 [2022-04-06 19:37:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:29,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668973867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:29,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:29,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 38 [2022-04-06 19:37:29,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:29,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [68683993] [2022-04-06 19:37:29,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [68683993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:29,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:29,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:37:29,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742665541] [2022-04-06 19:37:29,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:29,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:37:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:37:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:37:29,529 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:30,419 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-04-06 19:37:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:37:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:30,420 INFO L225 Difference]: With dead ends: 319 [2022-04-06 19:37:30,420 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 19:37:30,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:37:30,421 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:30,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 91 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:37:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 19:37:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-04-06 19:37:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-04-06 19:37:30,629 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-04-06 19:37:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:30,629 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-04-06 19:37:30,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-04-06 19:37:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:30,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:30,629 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:30,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 19:37:30,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 19:37:30,830 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 51 times [2022-04-06 19:37:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:30,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158726918] [2022-04-06 19:37:30,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:30,831 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 52 times [2022-04-06 19:37:30,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513012609] [2022-04-06 19:37:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:30,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:31,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:37:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513012609] [2022-04-06 19:37:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513012609] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633922832] [2022-04-06 19:37:31,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:37:31,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:31,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:31,248 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:31,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 19:37:31,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:37:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:37:31,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:31,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:37:31,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:37:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:37:32,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:32,332 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:37:32,333 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 36 treesize of output 81 [2022-04-06 19:37:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:32,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633922832] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:32,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:32,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-04-06 19:37:32,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:32,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158726918] [2022-04-06 19:37:32,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158726918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:32,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:32,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:37:32,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929858476] [2022-04-06 19:37:32,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:32,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:37:32,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:32,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:37:32,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:37:32,453 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:33,424 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-04-06 19:37:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:37:33,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:33,425 INFO L225 Difference]: With dead ends: 325 [2022-04-06 19:37:33,425 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 19:37:33,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=2304, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:37:33,425 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 102 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:33,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 88 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:37:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 19:37:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-04-06 19:37:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2008196721311475) internal successors, (293), 244 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-04-06 19:37:33,631 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 102 [2022-04-06 19:37:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:33,631 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-04-06 19:37:33,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-04-06 19:37:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:33,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:33,632 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:33,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 19:37:33,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:33,840 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 53 times [2022-04-06 19:37:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:33,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719779399] [2022-04-06 19:37:33,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:33,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 54 times [2022-04-06 19:37:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:33,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872651776] [2022-04-06 19:37:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:37:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872651776] [2022-04-06 19:37:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872651776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425671675] [2022-04-06 19:37:34,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:37:34,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:34,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:34,342 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:34,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 19:37:35,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:37:35,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 19:37:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:35,969 INFO L356 Elim1Store]: treesize reduction 46, result has 33.3 percent of original size [2022-04-06 19:37:35,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 39 [2022-04-06 19:37:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 38 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:36,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:36,689 INFO L356 Elim1Store]: treesize reduction 114, result has 53.5 percent of original size [2022-04-06 19:37:36,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 146 [2022-04-06 19:37:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 73 proven. 10 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:38,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425671675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:38,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:38,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 13] total 41 [2022-04-06 19:37:38,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:38,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719779399] [2022-04-06 19:37:38,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719779399] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:38,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:38,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:37:38,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726662207] [2022-04-06 19:37:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:38,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:37:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:37:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:37:38,127 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:39,365 INFO L93 Difference]: Finished difference Result 385 states and 452 transitions. [2022-04-06 19:37:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:37:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:39,367 INFO L225 Difference]: With dead ends: 385 [2022-04-06 19:37:39,367 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 19:37:39,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:37:39,367 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 125 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:39,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 101 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:37:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 19:37:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 270. [2022-04-06 19:37:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2075471698113207) internal successors, (320), 265 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 324 transitions. [2022-04-06 19:37:39,600 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 324 transitions. Word has length 102 [2022-04-06 19:37:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:39,600 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 324 transitions. [2022-04-06 19:37:39,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 324 transitions. [2022-04-06 19:37:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:39,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:39,601 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:39,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:39,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:39,802 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:39,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 55 times [2022-04-06 19:37:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:39,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051174819] [2022-04-06 19:37:39,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:39,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 56 times [2022-04-06 19:37:39,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:39,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212625646] [2022-04-06 19:37:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:40,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 19:37:40,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:40,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212625646] [2022-04-06 19:37:40,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212625646] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:40,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127744538] [2022-04-06 19:37:40,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:37:40,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:40,303 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:40,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 19:37:40,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:37:40,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:37:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:41,033 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:37:41,033 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 38 treesize of output 14 [2022-04-06 19:37:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 19:37:41,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:41,396 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:37:41,396 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 56 treesize of output 110 [2022-04-06 19:37:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 19:37:41,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127744538] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:41,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:41,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-04-06 19:37:41,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:41,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051174819] [2022-04-06 19:37:41,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051174819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:41,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:41,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:37:41,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707392543] [2022-04-06 19:37:41,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:41,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:37:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:37:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:37:41,529 INFO L87 Difference]: Start difference. First operand 270 states and 324 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:42,598 INFO L93 Difference]: Finished difference Result 846 states and 1013 transitions. [2022-04-06 19:37:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:37:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:42,600 INFO L225 Difference]: With dead ends: 846 [2022-04-06 19:37:42,601 INFO L226 Difference]: Without dead ends: 747 [2022-04-06 19:37:42,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1498, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:37:42,601 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:42,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 52 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:37:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-04-06 19:37:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 352. [2022-04-06 19:37:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.2046109510086456) internal successors, (418), 347 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 422 transitions. [2022-04-06 19:37:42,929 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 422 transitions. Word has length 102 [2022-04-06 19:37:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:42,929 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 422 transitions. [2022-04-06 19:37:42,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 422 transitions. [2022-04-06 19:37:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:42,930 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:42,930 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:42,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 19:37:43,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 19:37:43,135 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 57 times [2022-04-06 19:37:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903677592] [2022-04-06 19:37:43,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:43,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 58 times [2022-04-06 19:37:43,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498314151] [2022-04-06 19:37:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:43,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 85 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 19:37:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498314151] [2022-04-06 19:37:43,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498314151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:43,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090191475] [2022-04-06 19:37:43,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:37:43,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:43,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:43,632 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:43,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 19:37:43,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:37:43,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 19:37:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:43,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:37:44,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,088 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 [2022-04-06 19:37:44,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,218 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 [2022-04-06 19:37:44,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:44,283 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 [2022-04-06 19:37:44,313 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 [2022-04-06 19:37:45,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:37:45,323 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-04-06 19:37:45,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 27 [2022-04-06 19:37:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:37:45,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:46,135 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3848 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3848) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_3848 |c_main_~#string_entrada~0.offset|))) (or (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (not (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)) .cse1))))) is different from false [2022-04-06 19:37:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 19:37:46,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090191475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:46,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:46,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 56 [2022-04-06 19:37:46,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:46,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903677592] [2022-04-06 19:37:46,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903677592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:46,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:46,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:37:46,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12645247] [2022-04-06 19:37:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:46,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:37:46,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:46,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:37:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2679, Unknown=1, NotChecked=106, Total=3080 [2022-04-06 19:37:46,312 INFO L87 Difference]: Start difference. First operand 352 states and 422 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:48,120 INFO L93 Difference]: Finished difference Result 692 states and 822 transitions. [2022-04-06 19:37:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:37:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:48,122 INFO L225 Difference]: With dead ends: 692 [2022-04-06 19:37:48,122 INFO L226 Difference]: Without dead ends: 593 [2022-04-06 19:37:48,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=514, Invalid=5341, Unknown=1, NotChecked=150, Total=6006 [2022-04-06 19:37:48,123 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 123 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:48,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 63 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:37:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-04-06 19:37:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 533. [2022-04-06 19:37:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.2007575757575757) internal successors, (634), 528 states have internal predecessors, (634), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 638 transitions. [2022-04-06 19:37:48,643 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 638 transitions. Word has length 102 [2022-04-06 19:37:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:48,643 INFO L478 AbstractCegarLoop]: Abstraction has 533 states and 638 transitions. [2022-04-06 19:37:48,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 638 transitions. [2022-04-06 19:37:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:48,644 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:48,644 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:48,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 19:37:48,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 19:37:48,846 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 59 times [2022-04-06 19:37:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:48,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598654503] [2022-04-06 19:37:48,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:48,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:48,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 60 times [2022-04-06 19:37:48,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:48,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746208113] [2022-04-06 19:37:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:48,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:49,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-04-06 19:37:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746208113] [2022-04-06 19:37:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746208113] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317794993] [2022-04-06 19:37:49,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:37:49,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:49,471 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:49,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 19:37:50,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:37:50,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:37:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:50,912 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-04-06 19:37:50,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2022-04-06 19:37:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:37:50,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:51,778 INFO L356 Elim1Store]: treesize reduction 122, result has 52.2 percent of original size [2022-04-06 19:37:51,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 148 [2022-04-06 19:37:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:37:54,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317794993] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:54,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:54,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 51 [2022-04-06 19:37:54,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598654503] [2022-04-06 19:37:54,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598654503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:54,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:54,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:37:54,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063578173] [2022-04-06 19:37:54,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:54,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:37:54,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:37:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:37:54,156 INFO L87 Difference]: Start difference. First operand 533 states and 638 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:55,978 INFO L93 Difference]: Finished difference Result 1164 states and 1390 transitions. [2022-04-06 19:37:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:37:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:37:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:55,981 INFO L225 Difference]: With dead ends: 1164 [2022-04-06 19:37:55,981 INFO L226 Difference]: Without dead ends: 1053 [2022-04-06 19:37:55,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=467, Invalid=3439, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:37:55,982 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 231 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:55,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 76 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:37:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-04-06 19:37:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 557. [2022-04-06 19:37:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 552 states have (on average 1.1992753623188406) internal successors, (662), 552 states have internal predecessors, (662), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 666 transitions. [2022-04-06 19:37:56,544 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 666 transitions. Word has length 102 [2022-04-06 19:37:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:56,544 INFO L478 AbstractCegarLoop]: Abstraction has 557 states and 666 transitions. [2022-04-06 19:37:56,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 666 transitions. [2022-04-06 19:37:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:37:56,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:56,545 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:56,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 19:37:56,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:56,751 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 61 times [2022-04-06 19:37:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:56,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517099365] [2022-04-06 19:37:56,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:56,752 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 62 times [2022-04-06 19:37:56,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:56,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968930311] [2022-04-06 19:37:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:57,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 127 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 19:37:57,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968930311] [2022-04-06 19:37:57,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968930311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582598352] [2022-04-06 19:37:57,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:37:57,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:57,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:57,364 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:57,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 19:37:57,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:37:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 19:37:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:57,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:37:57,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:37:57,975 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 [2022-04-06 19:37:58,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-04-06 19:37:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 19:37:58,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:58,959 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_3968 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3968 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3968) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 19:37:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-04-06 19:37:59,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582598352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:59,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:59,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 12] total 46 [2022-04-06 19:37:59,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:59,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517099365] [2022-04-06 19:37:59,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517099365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:59,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:59,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:37:59,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25579856] [2022-04-06 19:37:59,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:59,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:37:59,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:59,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:37:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1797, Unknown=1, NotChecked=86, Total=2070 [2022-04-06 19:37:59,070 INFO L87 Difference]: Start difference. First operand 557 states and 666 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:01,309 INFO L93 Difference]: Finished difference Result 806 states and 944 transitions. [2022-04-06 19:38:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:38:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:38:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:01,311 INFO L225 Difference]: With dead ends: 806 [2022-04-06 19:38:01,311 INFO L226 Difference]: Without dead ends: 695 [2022-04-06 19:38:01,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=441, Invalid=4818, Unknown=1, NotChecked=142, Total=5402 [2022-04-06 19:38:01,312 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:01,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 90 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:38:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-04-06 19:38:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 575. [2022-04-06 19:38:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.1964912280701754) internal successors, (682), 570 states have internal predecessors, (682), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 686 transitions. [2022-04-06 19:38:01,886 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 686 transitions. Word has length 102 [2022-04-06 19:38:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:01,887 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 686 transitions. [2022-04-06 19:38:01,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 686 transitions. [2022-04-06 19:38:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:38:01,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:01,887 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:01,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 19:38:02,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:02,103 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 63 times [2022-04-06 19:38:02,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465363599] [2022-04-06 19:38:02,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:02,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:02,105 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 64 times [2022-04-06 19:38:02,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:02,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271937934] [2022-04-06 19:38:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:02,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:02,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 148 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 19:38:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:02,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271937934] [2022-04-06 19:38:02,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271937934] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:02,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992005363] [2022-04-06 19:38:02,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:38:02,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:02,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:02,749 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:02,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 19:38:03,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:38:03,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 19:38:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:03,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:38:03,145 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 [2022-04-06 19:38:03,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:03,246 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 [2022-04-06 19:38:03,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:03,290 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 [2022-04-06 19:38:03,311 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 23 treesize of output 23 [2022-04-06 19:38:03,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:03,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:03,375 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 [2022-04-06 19:38:03,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:03,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:04,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:38:04,413 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-04-06 19:38:04,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 27 [2022-04-06 19:38:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:38:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:05,328 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4037 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4037) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_4037 |c_main_~#string_entrada~0.offset|))) (or (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (not (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)) .cse1))))) is different from false [2022-04-06 19:38:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 19:38:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992005363] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:05,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:05,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 20] total 61 [2022-04-06 19:38:05,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:05,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465363599] [2022-04-06 19:38:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465363599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:05,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:05,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:38:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920650634] [2022-04-06 19:38:05,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:05,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:38:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:38:05,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3243, Unknown=1, NotChecked=116, Total=3660 [2022-04-06 19:38:05,505 INFO L87 Difference]: Start difference. First operand 575 states and 686 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:08,236 INFO L93 Difference]: Finished difference Result 854 states and 994 transitions. [2022-04-06 19:38:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:38:08,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:38:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:08,238 INFO L225 Difference]: With dead ends: 854 [2022-04-06 19:38:08,238 INFO L226 Difference]: Without dead ends: 731 [2022-04-06 19:38:08,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=595, Invalid=7598, Unknown=1, NotChecked=178, Total=8372 [2022-04-06 19:38:08,239 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:08,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 89 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:38:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-04-06 19:38:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 581. [2022-04-06 19:38:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 1.1944444444444444) internal successors, (688), 576 states have internal predecessors, (688), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 692 transitions. [2022-04-06 19:38:08,841 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 692 transitions. Word has length 102 [2022-04-06 19:38:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:08,841 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 692 transitions. [2022-04-06 19:38:08,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 692 transitions. [2022-04-06 19:38:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:38:08,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:08,842 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:08,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:09,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:09,059 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 65 times [2022-04-06 19:38:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [749333368] [2022-04-06 19:38:09,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:09,061 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 66 times [2022-04-06 19:38:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454014121] [2022-04-06 19:38:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:09,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 19:38:09,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454014121] [2022-04-06 19:38:09,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454014121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:09,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297491833] [2022-04-06 19:38:09,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:38:09,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:09,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:09,813 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:09,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 19:38:10,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:38:10,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 19:38:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:10,899 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:38:10,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 11 [2022-04-06 19:38:10,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:10,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:10,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:11,017 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 [2022-04-06 19:38:11,033 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 [2022-04-06 19:38:11,049 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 [2022-04-06 19:38:11,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:11,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:11,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:11,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:11,145 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 [2022-04-06 19:38:11,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 16 [2022-04-06 19:38:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 19:38:11,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:24,877 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_4103 (Array Int Int))) (let ((.cse1 (select v_ArrVal_4103 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4103) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-04-06 19:38:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 19:38:24,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297491833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:24,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 16] total 54 [2022-04-06 19:38:24,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:24,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [749333368] [2022-04-06 19:38:24,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [749333368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:24,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:38:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548415027] [2022-04-06 19:38:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:24,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:38:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:38:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2434, Unknown=7, NotChecked=102, Total=2862 [2022-04-06 19:38:24,997 INFO L87 Difference]: Start difference. First operand 581 states and 692 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:27,849 INFO L93 Difference]: Finished difference Result 1862 states and 2209 transitions. [2022-04-06 19:38:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:38:27,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:38:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:27,853 INFO L225 Difference]: With dead ends: 1862 [2022-04-06 19:38:27,853 INFO L226 Difference]: Without dead ends: 1639 [2022-04-06 19:38:27,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=547, Invalid=5000, Unknown=7, NotChecked=146, Total=5700 [2022-04-06 19:38:27,854 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 309 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:27,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 114 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:38:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-04-06 19:38:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1032. [2022-04-06 19:38:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.1976630963972736) internal successors, (1230), 1027 states have internal predecessors, (1230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1234 transitions. [2022-04-06 19:38:28,942 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1234 transitions. Word has length 102 [2022-04-06 19:38:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:28,942 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1234 transitions. [2022-04-06 19:38:28,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1234 transitions. [2022-04-06 19:38:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:38:28,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:28,943 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:28,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 19:38:29,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:29,150 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 67 times [2022-04-06 19:38:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:29,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776552316] [2022-04-06 19:38:29,151 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:29,151 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 68 times [2022-04-06 19:38:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:29,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46610962] [2022-04-06 19:38:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:30,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 125 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 19:38:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:30,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46610962] [2022-04-06 19:38:30,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46610962] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:30,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629548547] [2022-04-06 19:38:30,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:38:30,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:30,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:30,124 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:30,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 19:38:30,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:38:30,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:30,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 19:38:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:30,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:38:30,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,550 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 [2022-04-06 19:38:30,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:30,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:38:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 19:38:31,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:31,951 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_4169 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4169) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_4169 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-04-06 19:38:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:38:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629548547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:32,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:32,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 14] total 45 [2022-04-06 19:38:32,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:32,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776552316] [2022-04-06 19:38:32,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776552316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:32,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:32,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:38:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793051375] [2022-04-06 19:38:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:32,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:38:32,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:38:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1696, Unknown=1, NotChecked=84, Total=1980 [2022-04-06 19:38:32,077 INFO L87 Difference]: Start difference. First operand 1032 states and 1234 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:37,137 INFO L93 Difference]: Finished difference Result 2777 states and 3309 transitions. [2022-04-06 19:38:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:38:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:38:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:37,143 INFO L225 Difference]: With dead ends: 2777 [2022-04-06 19:38:37,143 INFO L226 Difference]: Without dead ends: 2648 [2022-04-06 19:38:37,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=775, Invalid=5708, Unknown=1, NotChecked=158, Total=6642 [2022-04-06 19:38:37,145 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 467 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:37,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 67 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:38:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2022-04-06 19:38:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1495. [2022-04-06 19:38:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1490 states have (on average 1.2080536912751678) internal successors, (1800), 1490 states have internal predecessors, (1800), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1804 transitions. [2022-04-06 19:38:38,837 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1804 transitions. Word has length 102 [2022-04-06 19:38:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:38,837 INFO L478 AbstractCegarLoop]: Abstraction has 1495 states and 1804 transitions. [2022-04-06 19:38:38,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1804 transitions. [2022-04-06 19:38:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:38:38,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:38,839 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:38,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 19:38:39,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:39,040 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 69 times [2022-04-06 19:38:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:39,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1747020723] [2022-04-06 19:38:39,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:39,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 70 times [2022-04-06 19:38:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825818887] [2022-04-06 19:38:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:39,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:39,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 19:38:39,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825818887] [2022-04-06 19:38:39,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825818887] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395032478] [2022-04-06 19:38:39,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:38:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:39,163 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:39,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 19:38:39,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:38:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:39,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:38:39,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-04-06 19:38:39,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 19:38:39,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395032478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:39,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:39,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-04-06 19:38:39,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1747020723] [2022-04-06 19:38:39,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1747020723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:39,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:39,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:38:39,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794595081] [2022-04-06 19:38:39,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:39,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:38:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:39,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:38:39,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:38:39,963 INFO L87 Difference]: Start difference. First operand 1495 states and 1804 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:45,543 INFO L93 Difference]: Finished difference Result 4338 states and 5267 transitions. [2022-04-06 19:38:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:38:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:38:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:45,554 INFO L225 Difference]: With dead ends: 4338 [2022-04-06 19:38:45,554 INFO L226 Difference]: Without dead ends: 4332 [2022-04-06 19:38:45,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:38:45,556 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:45,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 143 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:38:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2022-04-06 19:38:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3353. [2022-04-06 19:38:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3348 states have (on average 1.2144563918757467) internal successors, (4066), 3348 states have internal predecessors, (4066), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4070 transitions. [2022-04-06 19:38:49,544 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4070 transitions. Word has length 102 [2022-04-06 19:38:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:49,544 INFO L478 AbstractCegarLoop]: Abstraction has 3353 states and 4070 transitions. [2022-04-06 19:38:49,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4070 transitions. [2022-04-06 19:38:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:38:49,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:49,548 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:49,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:49,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 19:38:49,765 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 71 times [2022-04-06 19:38:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:49,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310765873] [2022-04-06 19:38:49,766 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:49,766 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 72 times [2022-04-06 19:38:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:49,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096179964] [2022-04-06 19:38:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:38:50,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096179964] [2022-04-06 19:38:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096179964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124317032] [2022-04-06 19:38:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:38:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:50,125 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:50,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 19:38:51,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:38:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:38:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 61 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-04-06 19:38:51,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 19:38:52,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124317032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:52,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:52,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 16] total 40 [2022-04-06 19:38:52,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310765873] [2022-04-06 19:38:52,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310765873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:52,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:52,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:38:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677012297] [2022-04-06 19:38:52,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:52,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:38:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:38:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:38:52,634 INFO L87 Difference]: Start difference. First operand 3353 states and 4070 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:56,950 INFO L93 Difference]: Finished difference Result 4761 states and 5766 transitions. [2022-04-06 19:38:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:38:56,950 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 102 [2022-04-06 19:38:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:56,957 INFO L225 Difference]: With dead ends: 4761 [2022-04-06 19:38:56,957 INFO L226 Difference]: Without dead ends: 3380 [2022-04-06 19:38:56,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:38:56,960 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:56,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:38:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2022-04-06 19:39:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3371. [2022-04-06 19:39:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3366 states have (on average 1.2118241235888294) internal successors, (4079), 3366 states have internal predecessors, (4079), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 4083 transitions. [2022-04-06 19:39:00,928 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 4083 transitions. Word has length 102 [2022-04-06 19:39:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:00,929 INFO L478 AbstractCegarLoop]: Abstraction has 3371 states and 4083 transitions. [2022-04-06 19:39:00,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 4083 transitions. [2022-04-06 19:39:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:39:00,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:00,933 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:00,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 19:39:01,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:01,140 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 73 times [2022-04-06 19:39:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107168625] [2022-04-06 19:39:01,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:01,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 74 times [2022-04-06 19:39:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469261027] [2022-04-06 19:39:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 113 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-04-06 19:39:01,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469261027] [2022-04-06 19:39:01,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469261027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196624868] [2022-04-06 19:39:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:39:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:01,772 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:01,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 19:39:01,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:39:01,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:01,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 19:39:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:02,719 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:39:02,719 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 38 treesize of output 14 [2022-04-06 19:39:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 19:39:02,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:03,270 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-04-06 19:39:03,271 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 56 treesize of output 110 [2022-04-06 19:39:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 19:39:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196624868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:03,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:03,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 44 [2022-04-06 19:39:03,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:03,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107168625] [2022-04-06 19:39:03,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107168625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:03,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:03,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:39:03,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858533330] [2022-04-06 19:39:03,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:03,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:39:03,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:39:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:39:03,423 INFO L87 Difference]: Start difference. First operand 3371 states and 4083 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:12,234 INFO L93 Difference]: Finished difference Result 7225 states and 8647 transitions. [2022-04-06 19:39:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:39:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:39:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:12,244 INFO L225 Difference]: With dead ends: 7225 [2022-04-06 19:39:12,244 INFO L226 Difference]: Without dead ends: 5820 [2022-04-06 19:39:12,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=641, Invalid=5679, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:39:12,248 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:12,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 82 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:39:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2022-04-06 19:39:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 3208. [2022-04-06 19:39:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3203 states have (on average 1.2119887605369966) internal successors, (3882), 3203 states have internal predecessors, (3882), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3886 transitions. [2022-04-06 19:39:16,239 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3886 transitions. Word has length 102 [2022-04-06 19:39:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:16,240 INFO L478 AbstractCegarLoop]: Abstraction has 3208 states and 3886 transitions. [2022-04-06 19:39:16,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3886 transitions. [2022-04-06 19:39:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:39:16,243 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:16,243 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:16,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:16,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:16,443 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 75 times [2022-04-06 19:39:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400281242] [2022-04-06 19:39:16,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:16,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 76 times [2022-04-06 19:39:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62656332] [2022-04-06 19:39:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:17,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 67 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-04-06 19:39:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62656332] [2022-04-06 19:39:17,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62656332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380810253] [2022-04-06 19:39:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:39:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:17,159 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:17,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 19:39:17,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:39:17,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 19:39:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:39:18,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:39:18,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:39:18,052 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 31 treesize of output 14 [2022-04-06 19:39:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 19:39:18,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:28,922 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:39:28,923 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 36 treesize of output 81 [2022-04-06 19:39:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 68 proven. 55 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 19:39:29,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380810253] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:29,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:29,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 40 [2022-04-06 19:39:29,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400281242] [2022-04-06 19:39:29,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400281242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:29,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:29,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:39:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946894654] [2022-04-06 19:39:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:29,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:39:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:39:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1308, Unknown=18, NotChecked=0, Total=1560 [2022-04-06 19:39:29,047 INFO L87 Difference]: Start difference. First operand 3208 states and 3886 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:39,858 INFO L93 Difference]: Finished difference Result 8895 states and 10695 transitions. [2022-04-06 19:39:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:39:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:39:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:39,869 INFO L225 Difference]: With dead ends: 8895 [2022-04-06 19:39:39,869 INFO L226 Difference]: Without dead ends: 7066 [2022-04-06 19:39:39,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=820, Invalid=4132, Unknown=18, NotChecked=0, Total=4970 [2022-04-06 19:39:39,873 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 449 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:39,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 48 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:39:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-04-06 19:39:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 3705. [2022-04-06 19:39:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3700 states have (on average 1.194054054054054) internal successors, (4418), 3700 states have internal predecessors, (4418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4422 transitions. [2022-04-06 19:39:44,517 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4422 transitions. Word has length 102 [2022-04-06 19:39:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:44,517 INFO L478 AbstractCegarLoop]: Abstraction has 3705 states and 4422 transitions. [2022-04-06 19:39:44,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4422 transitions. [2022-04-06 19:39:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:39:44,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:44,521 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:44,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:44,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:44,721 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 77 times [2022-04-06 19:39:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [65245653] [2022-04-06 19:39:44,722 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:44,722 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 78 times [2022-04-06 19:39:44,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:44,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686302251] [2022-04-06 19:39:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:44,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:45,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:39:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686302251] [2022-04-06 19:39:45,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686302251] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75522289] [2022-04-06 19:39:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:39:45,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:45,163 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:45,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 19:39:46,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:39:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:46,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 19:39:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:46,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:39:46,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,553 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 [2022-04-06 19:39:46,578 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 [2022-04-06 19:39:46,608 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 [2022-04-06 19:39:46,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:46,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-04-06 19:39:48,557 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 44 treesize of output 16 [2022-04-06 19:39:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 40 proven. 129 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-04-06 19:39:48,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:50,008 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4452 (Array Int Int))) (let ((.cse1 (select v_ArrVal_4452 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4452) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 9)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|))))) is different from false [2022-04-06 19:39:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 129 refuted. 0 times theorem prover too weak. 173 trivial. 19 not checked. [2022-04-06 19:39:50,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75522289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:50,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:50,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 25] total 62 [2022-04-06 19:39:50,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:50,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [65245653] [2022-04-06 19:39:50,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [65245653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:50,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:50,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:39:50,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308211019] [2022-04-06 19:39:50,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:50,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:39:50,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:39:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=3110, Unknown=1, NotChecked=118, Total=3782 [2022-04-06 19:39:50,252 INFO L87 Difference]: Start difference. First operand 3705 states and 4422 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:56,554 INFO L93 Difference]: Finished difference Result 4479 states and 5345 transitions. [2022-04-06 19:39:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:39:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:39:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:56,560 INFO L225 Difference]: With dead ends: 4479 [2022-04-06 19:39:56,560 INFO L226 Difference]: Without dead ends: 4188 [2022-04-06 19:39:56,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=707, Invalid=4846, Unknown=1, NotChecked=146, Total=5700 [2022-04-06 19:39:56,562 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:56,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 105 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:39:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2022-04-06 19:40:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3747. [2022-04-06 19:40:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3742 states have (on average 1.196151790486371) internal successors, (4476), 3742 states have internal predecessors, (4476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 4480 transitions. [2022-04-06 19:40:01,393 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 4480 transitions. Word has length 102 [2022-04-06 19:40:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:01,393 INFO L478 AbstractCegarLoop]: Abstraction has 3747 states and 4480 transitions. [2022-04-06 19:40:01,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 4480 transitions. [2022-04-06 19:40:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:40:01,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:01,397 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:01,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 19:40:01,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:01,597 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:01,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 1 times [2022-04-06 19:40:01,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:01,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222408590] [2022-04-06 19:40:01,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:01,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 2 times [2022-04-06 19:40:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:01,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907510976] [2022-04-06 19:40:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-04-06 19:40:02,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907510976] [2022-04-06 19:40:02,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907510976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431633698] [2022-04-06 19:40:02,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:40:02,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:02,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:02,167 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:02,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 19:40:02,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:40:02,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:40:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:02,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:40:02,835 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:40:02,835 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 26 treesize of output 10 [2022-04-06 19:40:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:03,052 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-04-06 19:40:03,052 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 32 treesize of output 65 [2022-04-06 19:40:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:03,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431633698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:03,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:03,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 25 [2022-04-06 19:40:03,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222408590] [2022-04-06 19:40:03,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222408590] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:03,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:03,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:40:03,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960626630] [2022-04-06 19:40:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:03,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:40:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:03,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:40:03,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:40:03,144 INFO L87 Difference]: Start difference. First operand 3747 states and 4480 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:11,339 INFO L93 Difference]: Finished difference Result 6289 states and 7484 transitions. [2022-04-06 19:40:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:40:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:40:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:11,348 INFO L225 Difference]: With dead ends: 6289 [2022-04-06 19:40:11,349 INFO L226 Difference]: Without dead ends: 5229 [2022-04-06 19:40:11,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:40:11,352 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 260 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:11,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 52 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:40:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2022-04-06 19:40:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 3360. [2022-04-06 19:40:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3355 states have (on average 1.1907600596125187) internal successors, (3995), 3355 states have internal predecessors, (3995), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 3999 transitions. [2022-04-06 19:40:15,792 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 3999 transitions. Word has length 102 [2022-04-06 19:40:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:15,792 INFO L478 AbstractCegarLoop]: Abstraction has 3360 states and 3999 transitions. [2022-04-06 19:40:15,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 3999 transitions. [2022-04-06 19:40:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:40:15,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:15,795 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:15,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 19:40:15,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:15,996 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 79 times [2022-04-06 19:40:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607719368] [2022-04-06 19:40:15,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:15,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 80 times [2022-04-06 19:40:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937393264] [2022-04-06 19:40:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:16,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 19:40:16,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:16,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937393264] [2022-04-06 19:40:16,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937393264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:16,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144140528] [2022-04-06 19:40:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:40:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:16,382 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:16,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 19:40:16,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:40:16,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:40:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:16,978 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:40:16,978 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 27 treesize of output 15 [2022-04-06 19:40:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:17,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:17,213 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:40:17,213 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 32 treesize of output 73 [2022-04-06 19:40:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:17,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144140528] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:17,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:17,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 30 [2022-04-06 19:40:17,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:17,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607719368] [2022-04-06 19:40:17,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607719368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:17,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:17,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:40:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981736944] [2022-04-06 19:40:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:17,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:40:17,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:40:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:40:17,324 INFO L87 Difference]: Start difference. First operand 3360 states and 3999 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:25,224 INFO L93 Difference]: Finished difference Result 5781 states and 6927 transitions. [2022-04-06 19:40:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:40:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:40:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:25,233 INFO L225 Difference]: With dead ends: 5781 [2022-04-06 19:40:25,233 INFO L226 Difference]: Without dead ends: 5430 [2022-04-06 19:40:25,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:40:25,235 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 84 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:25,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 73 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:40:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2022-04-06 19:40:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 5429. [2022-04-06 19:40:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5429 states, 5424 states have (on average 1.1952433628318584) internal successors, (6483), 5424 states have internal predecessors, (6483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5429 states to 5429 states and 6487 transitions. [2022-04-06 19:40:32,565 INFO L78 Accepts]: Start accepts. Automaton has 5429 states and 6487 transitions. Word has length 102 [2022-04-06 19:40:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:32,565 INFO L478 AbstractCegarLoop]: Abstraction has 5429 states and 6487 transitions. [2022-04-06 19:40:32,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5429 states and 6487 transitions. [2022-04-06 19:40:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:40:32,570 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:32,570 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:32,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:32,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 19:40:32,770 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909450, now seen corresponding path program 81 times [2022-04-06 19:40:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:32,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768667241] [2022-04-06 19:40:32,772 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:32,772 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909450, now seen corresponding path program 82 times [2022-04-06 19:40:32,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:32,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870469223] [2022-04-06 19:40:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:32,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 19:40:33,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870469223] [2022-04-06 19:40:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870469223] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310905413] [2022-04-06 19:40:33,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:40:33,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:33,273 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:33,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 19:40:33,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:40:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:40:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:33,878 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:40:33,878 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 27 treesize of output 15 [2022-04-06 19:40:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-04-06 19:40:33,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:34,108 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:40:34,108 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 32 treesize of output 73 [2022-04-06 19:40:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:34,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310905413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:34,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:34,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-04-06 19:40:34,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768667241] [2022-04-06 19:40:34,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768667241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:34,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:34,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:40:34,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232209520] [2022-04-06 19:40:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:34,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:40:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:40:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:40:34,184 INFO L87 Difference]: Start difference. First operand 5429 states and 6487 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:48,511 INFO L93 Difference]: Finished difference Result 10767 states and 12807 transitions. [2022-04-06 19:40:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:40:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:40:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:48,526 INFO L225 Difference]: With dead ends: 10767 [2022-04-06 19:40:48,526 INFO L226 Difference]: Without dead ends: 9712 [2022-04-06 19:40:48,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:40:48,529 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:48,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 56 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:40:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9712 states. [2022-04-06 19:40:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9712 to 6745. [2022-04-06 19:40:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6740 states have (on average 1.1945103857566766) internal successors, (8051), 6740 states have internal predecessors, (8051), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 8055 transitions. [2022-04-06 19:40:57,542 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 8055 transitions. Word has length 102 [2022-04-06 19:40:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:57,543 INFO L478 AbstractCegarLoop]: Abstraction has 6745 states and 8055 transitions. [2022-04-06 19:40:57,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 8055 transitions. [2022-04-06 19:40:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:40:57,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:57,548 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:57,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:57,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:57,749 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash 717887750, now seen corresponding path program 83 times [2022-04-06 19:40:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:57,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888717345] [2022-04-06 19:40:57,750 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:57,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash 717887750, now seen corresponding path program 84 times [2022-04-06 19:40:57,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:57,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981071268] [2022-04-06 19:40:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:58,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 19:40:58,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981071268] [2022-04-06 19:40:58,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981071268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:58,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559810670] [2022-04-06 19:40:58,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:40:58,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:58,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:58,302 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:58,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 19:40:58,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:40:58,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:40:58,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:58,976 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:40:58,976 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 27 treesize of output 15 [2022-04-06 19:40:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:59,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:59,210 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:40:59,210 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 32 treesize of output 73 [2022-04-06 19:40:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:40:59,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559810670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:59,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:59,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 33 [2022-04-06 19:40:59,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888717345] [2022-04-06 19:40:59,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888717345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:59,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:59,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:40:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441979504] [2022-04-06 19:40:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:59,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:40:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:40:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:40:59,292 INFO L87 Difference]: Start difference. First operand 6745 states and 8055 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:41:15,344 INFO L93 Difference]: Finished difference Result 12002 states and 14266 transitions. [2022-04-06 19:41:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:41:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:41:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:41:15,359 INFO L225 Difference]: With dead ends: 12002 [2022-04-06 19:41:15,359 INFO L226 Difference]: Without dead ends: 10959 [2022-04-06 19:41:15,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:41:15,364 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 338 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:41:15,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 57 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:41:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10959 states. [2022-04-06 19:41:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10959 to 8229. [2022-04-06 19:41:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8224 states have (on average 1.1904182879377432) internal successors, (9790), 8224 states have internal predecessors, (9790), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 9794 transitions. [2022-04-06 19:41:26,318 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 9794 transitions. Word has length 102 [2022-04-06 19:41:26,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:26,318 INFO L478 AbstractCegarLoop]: Abstraction has 8229 states and 9794 transitions. [2022-04-06 19:41:26,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 9794 transitions. [2022-04-06 19:41:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:41:26,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:26,325 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:26,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 19:41:26,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:26,526 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash 639581642, now seen corresponding path program 85 times [2022-04-06 19:41:26,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:26,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745823587] [2022-04-06 19:41:26,527 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:26,527 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash 639581642, now seen corresponding path program 86 times [2022-04-06 19:41:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998340152] [2022-04-06 19:41:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:26,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 128 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 19:41:27,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998340152] [2022-04-06 19:41:27,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998340152] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246228749] [2022-04-06 19:41:27,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:41:27,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:27,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:27,149 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:41:27,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 19:41:27,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:41:27,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:27,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:41:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:41:27,777 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:41:27,777 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 27 treesize of output 15 [2022-04-06 19:41:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:41:27,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:41:28,017 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:41:28,018 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 32 treesize of output 73 [2022-04-06 19:41:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:41:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246228749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:41:28,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:41:28,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 35 [2022-04-06 19:41:28,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:41:28,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745823587] [2022-04-06 19:41:28,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745823587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:41:28,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:41:28,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:41:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835906042] [2022-04-06 19:41:28,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:41:28,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:41:28,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:41:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:41:28,098 INFO L87 Difference]: Start difference. First operand 8229 states and 9794 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:41:46,068 INFO L93 Difference]: Finished difference Result 13381 states and 15863 transitions. [2022-04-06 19:41:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:41:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:41:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:41:46,088 INFO L225 Difference]: With dead ends: 13381 [2022-04-06 19:41:46,088 INFO L226 Difference]: Without dead ends: 12350 [2022-04-06 19:41:46,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:41:46,093 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 317 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:41:46,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 68 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:41:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12350 states. [2022-04-06 19:41:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12350 to 9611. [2022-04-06 19:41:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9606 states have (on average 1.189256714553404) internal successors, (11424), 9606 states have internal predecessors, (11424), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 11428 transitions. [2022-04-06 19:41:58,649 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 11428 transitions. Word has length 102 [2022-04-06 19:41:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:58,649 INFO L478 AbstractCegarLoop]: Abstraction has 9611 states and 11428 transitions. [2022-04-06 19:41:58,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 11428 transitions. [2022-04-06 19:41:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:41:58,659 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:58,659 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:58,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 19:41:58,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:58,859 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1747587194, now seen corresponding path program 87 times [2022-04-06 19:41:58,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:58,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243001988] [2022-04-06 19:41:58,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:58,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1747587194, now seen corresponding path program 88 times [2022-04-06 19:41:58,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:58,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25641364] [2022-04-06 19:41:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:58,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 149 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 19:41:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25641364] [2022-04-06 19:41:59,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25641364] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862093439] [2022-04-06 19:41:59,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:41:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:59,578 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:41:59,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 19:41:59,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:41:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:41:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:42:00,220 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:42:00,220 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 27 treesize of output 15 [2022-04-06 19:42:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-04-06 19:42:00,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:00,478 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:42:00,478 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 32 treesize of output 73 [2022-04-06 19:42:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:42:00,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862093439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:00,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 9] total 37 [2022-04-06 19:42:00,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243001988] [2022-04-06 19:42:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243001988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:00,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:42:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952029774] [2022-04-06 19:42:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:00,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:42:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:42:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:42:00,559 INFO L87 Difference]: Start difference. First operand 9611 states and 11428 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:42:20,313 INFO L93 Difference]: Finished difference Result 14679 states and 17385 transitions. [2022-04-06 19:42:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:42:20,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:42:20,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:42:20,333 INFO L225 Difference]: With dead ends: 14679 [2022-04-06 19:42:20,333 INFO L226 Difference]: Without dead ends: 13660 [2022-04-06 19:42:20,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=2763, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:42:20,338 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 344 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:42:20,338 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:42:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13660 states. [2022-04-06 19:42:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13660 to 10981. [2022-04-06 19:42:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10981 states, 10976 states have (on average 1.188411078717201) internal successors, (13044), 10976 states have internal predecessors, (13044), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10981 states to 10981 states and 13048 transitions. [2022-04-06 19:42:34,686 INFO L78 Accepts]: Start accepts. Automaton has 10981 states and 13048 transitions. Word has length 102 [2022-04-06 19:42:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:42:34,686 INFO L478 AbstractCegarLoop]: Abstraction has 10981 states and 13048 transitions. [2022-04-06 19:42:34,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10981 states and 13048 transitions. [2022-04-06 19:42:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:42:34,696 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:42:34,696 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:42:34,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 19:42:34,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:34,897 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:42:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:42:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1445242374, now seen corresponding path program 89 times [2022-04-06 19:42:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:34,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640806200] [2022-04-06 19:42:34,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:34,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:42:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1445242374, now seen corresponding path program 90 times [2022-04-06 19:42:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:42:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105960212] [2022-04-06 19:42:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:42:34,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:42:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:35,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:42:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 19:42:35,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:42:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105960212] [2022-04-06 19:42:35,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105960212] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:42:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792805436] [2022-04-06 19:42:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:42:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:42:35,323 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:42:35,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 19:42:35,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:42:35,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:42:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:42:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:42:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:42:36,147 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:42:36,147 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 27 treesize of output 15 [2022-04-06 19:42:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-04-06 19:42:36,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:36,373 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:42:36,374 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 32 treesize of output 73 [2022-04-06 19:42:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:42:36,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792805436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:36,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:36,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 25 [2022-04-06 19:42:36,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:36,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640806200] [2022-04-06 19:42:36,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640806200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:36,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:36,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:42:36,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523372434] [2022-04-06 19:42:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:36,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:42:36,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:42:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:42:36,461 INFO L87 Difference]: Start difference. First operand 10981 states and 13048 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:42:55,070 INFO L93 Difference]: Finished difference Result 14554 states and 17182 transitions. [2022-04-06 19:42:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:42:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:42:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:42:55,089 INFO L225 Difference]: With dead ends: 14554 [2022-04-06 19:42:55,089 INFO L226 Difference]: Without dead ends: 13406 [2022-04-06 19:42:55,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:42:55,095 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:42:55,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 58 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:42:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13406 states. [2022-04-06 19:43:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13406 to 11672. [2022-04-06 19:43:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11672 states, 11667 states have (on average 1.187794634439016) internal successors, (13858), 11667 states have internal predecessors, (13858), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11672 states to 11672 states and 13862 transitions. [2022-04-06 19:43:10,287 INFO L78 Accepts]: Start accepts. Automaton has 11672 states and 13862 transitions. Word has length 102 [2022-04-06 19:43:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:43:10,287 INFO L478 AbstractCegarLoop]: Abstraction has 11672 states and 13862 transitions. [2022-04-06 19:43:10,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 11672 states and 13862 transitions. [2022-04-06 19:43:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:43:10,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:43:10,295 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:43:10,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 19:43:10,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:10,496 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:43:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:43:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 91 times [2022-04-06 19:43:10,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:10,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996071660] [2022-04-06 19:43:10,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:43:10,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:43:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 92 times [2022-04-06 19:43:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:43:10,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407242731] [2022-04-06 19:43:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:43:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:43:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:10,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:43:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:43:10,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:43:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407242731] [2022-04-06 19:43:10,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407242731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:43:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268771764] [2022-04-06 19:43:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:43:10,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:10,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:43:10,817 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:43:10,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 19:43:11,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:43:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:43:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:43:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:43:11,574 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:43:11,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 19:43:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 19:43:11,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:43:16,181 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-04-06 19:43:16,181 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 36 treesize of output 73 [2022-04-06 19:43:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 68 proven. 55 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-04-06 19:43:16,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268771764] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:43:16,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:43:16,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 35 [2022-04-06 19:43:16,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:43:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [996071660] [2022-04-06 19:43:16,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [996071660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:43:16,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:43:16,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:43:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741236103] [2022-04-06 19:43:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:43:16,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:43:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:43:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1047, Unknown=7, NotChecked=0, Total=1190 [2022-04-06 19:43:16,312 INFO L87 Difference]: Start difference. First operand 11672 states and 13862 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:43:31,455 INFO L93 Difference]: Finished difference Result 15014 states and 17795 transitions. [2022-04-06 19:43:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:43:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 102 [2022-04-06 19:43:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:43:31,470 INFO L225 Difference]: With dead ends: 15014 [2022-04-06 19:43:31,471 INFO L226 Difference]: Without dead ends: 11159 [2022-04-06 19:43:31,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=190, Invalid=1525, Unknown=7, NotChecked=0, Total=1722 [2022-04-06 19:43:31,477 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:43:31,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:43:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11159 states. [2022-04-06 19:43:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11159 to 11141. [2022-04-06 19:43:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11136 states have (on average 1.1848958333333333) internal successors, (13195), 11136 states have internal predecessors, (13195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 13199 transitions. [2022-04-06 19:43:46,123 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 13199 transitions. Word has length 102 [2022-04-06 19:43:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:43:46,123 INFO L478 AbstractCegarLoop]: Abstraction has 11141 states and 13199 transitions. [2022-04-06 19:43:46,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 13199 transitions. [2022-04-06 19:43:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:43:46,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:43:46,131 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:43:46,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 19:43:46,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-04-06 19:43:46,331 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:43:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:43:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 93 times [2022-04-06 19:43:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:46,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1739649932] [2022-04-06 19:43:46,332 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:43:46,332 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:43:46,333 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 94 times [2022-04-06 19:43:46,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:43:46,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986629618] [2022-04-06 19:43:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:43:46,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:43:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:46,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:43:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 19:43:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:43:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986629618] [2022-04-06 19:43:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986629618] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:43:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375203106] [2022-04-06 19:43:46,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:43:46,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:43:46,790 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:43:46,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 19:43:47,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:43:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:43:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 19:43:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:43:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:43:48,671 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:43:48,671 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 28 treesize of output 13 [2022-04-06 19:43:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 266 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 19:43:48,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:43:57,451 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-04-06 19:43:57,452 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 36 treesize of output 73 [2022-04-06 19:43:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 19:43:57,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375203106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:43:57,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:43:57,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 35, 26] total 73 [2022-04-06 19:43:57,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:43:57,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1739649932] [2022-04-06 19:43:57,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1739649932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:43:57,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:43:57,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:43:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206212552] [2022-04-06 19:43:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:43:57,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:43:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:43:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=4752, Unknown=11, NotChecked=0, Total=5256 [2022-04-06 19:43:57,726 INFO L87 Difference]: Start difference. First operand 11141 states and 13199 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:13,657 INFO L93 Difference]: Finished difference Result 14829 states and 17528 transitions. [2022-04-06 19:44:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:44:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:44:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:13,673 INFO L225 Difference]: With dead ends: 14829 [2022-04-06 19:44:13,673 INFO L226 Difference]: Without dead ends: 11353 [2022-04-06 19:44:13,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=642, Invalid=6487, Unknown=11, NotChecked=0, Total=7140 [2022-04-06 19:44:13,680 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:13,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 90 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:44:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11353 states. [2022-04-06 19:44:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11353 to 10772. [2022-04-06 19:44:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10767 states have (on average 1.191232469582985) internal successors, (12826), 10767 states have internal predecessors, (12826), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 12830 transitions. [2022-04-06 19:44:28,049 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 12830 transitions. Word has length 102 [2022-04-06 19:44:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:28,049 INFO L478 AbstractCegarLoop]: Abstraction has 10772 states and 12830 transitions. [2022-04-06 19:44:28,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 12830 transitions. [2022-04-06 19:44:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:44:28,055 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:28,055 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:28,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 19:44:28,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 19:44:28,256 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 95 times [2022-04-06 19:44:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:28,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1297007325] [2022-04-06 19:44:28,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:28,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 96 times [2022-04-06 19:44:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119086651] [2022-04-06 19:44:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:28,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 19:44:28,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:28,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119086651] [2022-04-06 19:44:28,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119086651] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:28,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744189083] [2022-04-06 19:44:28,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:28,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:28,763 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:28,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 19:44:30,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:44:30,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 19:44:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:30,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:44:30,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 19:44:30,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 19:44:30,349 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 25 treesize of output 25 [2022-04-06 19:44:30,373 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 25 treesize of output 25 [2022-04-06 19:44:30,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 19:44:30,417 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 25 treesize of output 25 [2022-04-06 19:44:30,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 19:44:30,466 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 25 treesize of output 25 [2022-04-06 19:44:30,488 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 25 treesize of output 25 [2022-04-06 19:44:30,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 19:44:30,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-04-06 19:44:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:44:32,986 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:44:32,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 43 [2022-04-06 19:44:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-04-06 19:44:33,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:36,782 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0))))) is different from false [2022-04-06 19:44:38,658 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0)))))) is different from false [2022-04-06 19:44:38,786 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0)))))) is different from false [2022-04-06 19:44:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 230 trivial. 44 not checked. [2022-04-06 19:44:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744189083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:38,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:38,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 62 [2022-04-06 19:44:38,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:38,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1297007325] [2022-04-06 19:44:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1297007325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:38,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:38,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:44:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414999423] [2022-04-06 19:44:38,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:38,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:44:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:44:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2939, Unknown=3, NotChecked=348, Total=3782 [2022-04-06 19:44:38,940 INFO L87 Difference]: Start difference. First operand 10772 states and 12830 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:55,050 INFO L93 Difference]: Finished difference Result 11550 states and 13749 transitions. [2022-04-06 19:44:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:44:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:44:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:55,062 INFO L225 Difference]: With dead ends: 11550 [2022-04-06 19:44:55,063 INFO L226 Difference]: Without dead ends: 10979 [2022-04-06 19:44:55,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=627, Invalid=4638, Unknown=3, NotChecked=432, Total=5700 [2022-04-06 19:44:55,065 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:55,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 97 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:44:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-04-06 19:45:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10529. [2022-04-06 19:45:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10529 states, 10524 states have (on average 1.1952679589509692) internal successors, (12579), 10524 states have internal predecessors, (12579), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10529 states to 10529 states and 12583 transitions. [2022-04-06 19:45:08,876 INFO L78 Accepts]: Start accepts. Automaton has 10529 states and 12583 transitions. Word has length 102 [2022-04-06 19:45:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:08,876 INFO L478 AbstractCegarLoop]: Abstraction has 10529 states and 12583 transitions. [2022-04-06 19:45:08,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10529 states and 12583 transitions. [2022-04-06 19:45:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:45:08,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:08,881 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:08,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 19:45:09,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:09,087 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1680669622, now seen corresponding path program 97 times [2022-04-06 19:45:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [143118512] [2022-04-06 19:45:09,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:09,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1680669622, now seen corresponding path program 98 times [2022-04-06 19:45:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561365265] [2022-04-06 19:45:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:09,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 19:45:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561365265] [2022-04-06 19:45:09,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561365265] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84434387] [2022-04-06 19:45:09,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:09,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:09,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:09,552 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:09,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 19:45:09,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:45:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:10,152 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:45:10,152 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 27 treesize of output 15 [2022-04-06 19:45:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:45:10,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:10,402 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:45:10,402 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 32 treesize of output 73 [2022-04-06 19:45:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:45:10,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84434387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:10,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:10,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-04-06 19:45:10,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [143118512] [2022-04-06 19:45:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [143118512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:10,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:10,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:45:10,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172329034] [2022-04-06 19:45:10,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:10,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:45:10,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:45:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:45:10,502 INFO L87 Difference]: Start difference. First operand 10529 states and 12583 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:27,924 INFO L93 Difference]: Finished difference Result 13369 states and 15961 transitions. [2022-04-06 19:45:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:45:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:45:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:27,937 INFO L225 Difference]: With dead ends: 13369 [2022-04-06 19:45:27,937 INFO L226 Difference]: Without dead ends: 11988 [2022-04-06 19:45:27,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:45:27,940 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:27,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 61 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11988 states. [2022-04-06 19:45:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11988 to 10475. [2022-04-06 19:45:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10470 states have (on average 1.1917860553963706) internal successors, (12478), 10470 states have internal predecessors, (12478), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 12482 transitions. [2022-04-06 19:45:41,668 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 12482 transitions. Word has length 102 [2022-04-06 19:45:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:41,668 INFO L478 AbstractCegarLoop]: Abstraction has 10475 states and 12482 transitions. [2022-04-06 19:45:41,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 12482 transitions. [2022-04-06 19:45:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:45:41,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:41,673 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:41,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:41,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:41,874 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash 879787466, now seen corresponding path program 99 times [2022-04-06 19:45:41,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:41,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [381697660] [2022-04-06 19:45:41,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:41,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:41,875 INFO L85 PathProgramCache]: Analyzing trace with hash 879787466, now seen corresponding path program 100 times [2022-04-06 19:45:41,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:41,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92403397] [2022-04-06 19:45:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:41,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-04-06 19:45:42,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:42,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92403397] [2022-04-06 19:45:42,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92403397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:42,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974188603] [2022-04-06 19:45:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:42,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:42,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:42,178 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:42,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 19:45:42,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:42,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:45:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:42,820 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:45:42,820 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 27 treesize of output 15 [2022-04-06 19:45:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-04-06 19:45:42,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:43,063 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:45:43,063 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 32 treesize of output 73 [2022-04-06 19:45:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 19:45:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974188603] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:43,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:43,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-04-06 19:45:43,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [381697660] [2022-04-06 19:45:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [381697660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:43,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:43,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:45:43,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5035020] [2022-04-06 19:45:43,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:43,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:45:43,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:45:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:45:43,162 INFO L87 Difference]: Start difference. First operand 10475 states and 12482 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:57,568 INFO L93 Difference]: Finished difference Result 10948 states and 13029 transitions. [2022-04-06 19:45:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:45:57,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:45:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:57,579 INFO L225 Difference]: With dead ends: 10948 [2022-04-06 19:45:57,579 INFO L226 Difference]: Without dead ends: 10621 [2022-04-06 19:45:57,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:45:57,581 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:57,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 61 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2022-04-06 19:46:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 10478. [2022-04-06 19:46:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10473 states have (on average 1.190871765492218) internal successors, (12472), 10473 states have internal predecessors, (12472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 12476 transitions. [2022-04-06 19:46:11,195 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 12476 transitions. Word has length 102 [2022-04-06 19:46:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:11,195 INFO L478 AbstractCegarLoop]: Abstraction has 10478 states and 12476 transitions. [2022-04-06 19:46:11,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 12476 transitions. [2022-04-06 19:46:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:46:11,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:11,200 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:11,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-04-06 19:46:11,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 19:46:11,401 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 101 times [2022-04-06 19:46:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139061080] [2022-04-06 19:46:11,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:11,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 102 times [2022-04-06 19:46:11,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:11,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914104709] [2022-04-06 19:46:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:11,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 185 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 19:46:13,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:13,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914104709] [2022-04-06 19:46:13,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914104709] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:13,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488320227] [2022-04-06 19:46:13,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:13,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:13,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:13,003 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:13,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 19:46:13,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:46:13,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:46:13,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:13,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-04-06 19:46:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 85 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-04-06 19:46:14,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 55 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 19:46:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488320227] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:30,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 17] total 64 [2022-04-06 19:46:30,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139061080] [2022-04-06 19:46:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139061080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:30,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:46:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258839797] [2022-04-06 19:46:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:30,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:46:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:46:30,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3631, Unknown=17, NotChecked=0, Total=4032 [2022-04-06 19:46:30,974 INFO L87 Difference]: Start difference. First operand 10478 states and 12476 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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)