/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:49:41,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:49:41,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:49:41,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:49:41,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:49:41,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:49:41,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:49:41,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:49:41,745 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:49:41,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:49:41,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:49:41,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:49:41,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:49:41,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:49:41,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:49:41,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:49:41,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:49:41,749 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:49:41,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:49:41,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:49:41,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:49:41,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:49:41,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:49:41,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:49:41,750 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:49:41,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:49:41,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:49:41,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:49:41,967 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:49:41,968 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:49:41,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-03-20 17:49:42,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ae553d9/63540a0bf98d49fe99473b6208acb6bb/FLAG352386f4a [2022-03-20 17:49:42,381 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:49:42,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-03-20 17:49:42,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ae553d9/63540a0bf98d49fe99473b6208acb6bb/FLAG352386f4a [2022-03-20 17:49:42,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ae553d9/63540a0bf98d49fe99473b6208acb6bb [2022-03-20 17:49:42,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:49:42,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:49:42,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:49:42,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:49:42,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:49:42,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487ecadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42, skipping insertion in model container [2022-03-20 17:49:42,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:49:42,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:49:42,563 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-1.i[895,908] [2022-03-20 17:49:42,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:49:42,587 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:49:42,602 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-1.i[895,908] [2022-03-20 17:49:42,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:49:42,633 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:49:42,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42 WrapperNode [2022-03-20 17:49:42,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:49:42,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:49:42,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:49:42,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:49:42,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:49:42,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:49:42,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:49:42,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:49:42,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (1/1) ... [2022-03-20 17:49:42,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:49:42,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:42,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:49:42,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:49:42,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:49:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:49:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:49:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 17:49:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:49:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:49:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:49:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:49:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:49:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:49:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:49:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:49:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:49:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:49:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:49:42,818 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:49:42,819 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:49:43,042 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:49:43,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:49:43,047 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 17:49:43,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:49:43 BoogieIcfgContainer [2022-03-20 17:49:43,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:49:43,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:49:43,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:49:43,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:49:43,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:49:42" (1/3) ... [2022-03-20 17:49:43,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c44c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:49:43, skipping insertion in model container [2022-03-20 17:49:43,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:49:42" (2/3) ... [2022-03-20 17:49:43,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c44c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:49:43, skipping insertion in model container [2022-03-20 17:49:43,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:49:43" (3/3) ... [2022-03-20 17:49:43,055 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-03-20 17:49:43,060 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:49:43,060 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:49:43,106 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:49:43,117 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:49:43,118 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:49:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:49:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 17:49:43,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:43,148 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:43,148 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-03-20 17:49:43,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960531281] [2022-03-20 17:49:43,178 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:49:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 2 times [2022-03-20 17:49:43,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:43,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779559639] [2022-03-20 17:49:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:43,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779559639] [2022-03-20 17:49:43,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779559639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:43,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:43,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:49:43,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:43,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960531281] [2022-03-20 17:49:43,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960531281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:43,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:43,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:49:43,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47893337] [2022-03-20 17:49:43,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:43,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:49:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:49:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:49:43,445 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:43,496 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-03-20 17:49:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:49:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 17:49:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:43,507 INFO L225 Difference]: With dead ends: 66 [2022-03-20 17:49:43,508 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 17:49:43,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:49:43,514 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:43,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:49:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 17:49:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 17:49:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 17:49:43,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-03-20 17:49:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:43,551 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 17:49:43,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 17:49:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:49:43,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:43,553 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] [2022-03-20 17:49:43,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:49:43,554 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-03-20 17:49:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179594053] [2022-03-20 17:49:43,557 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:49:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 2 times [2022-03-20 17:49:43,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:43,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450161720] [2022-03-20 17:49:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:43,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450161720] [2022-03-20 17:49:43,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450161720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:43,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:43,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:49:43,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:43,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179594053] [2022-03-20 17:49:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179594053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:43,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:43,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:49:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228110308] [2022-03-20 17:49:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:43,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:49:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:49:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:49:43,677 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:43,805 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-03-20 17:49:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:49:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 17:49:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:43,810 INFO L225 Difference]: With dead ends: 67 [2022-03-20 17:49:43,813 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 17:49:43,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:49:43,816 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:43,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 17:49:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-20 17:49:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-03-20 17:49:43,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-03-20 17:49:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:43,824 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-03-20 17:49:43,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-03-20 17:49:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 17:49:43,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:43,825 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] [2022-03-20 17:49:43,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:49:43,825 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-03-20 17:49:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945715449] [2022-03-20 17:49:43,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:43,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 2 times [2022-03-20 17:49:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:43,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617026586] [2022-03-20 17:49:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:43,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:43,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617026586] [2022-03-20 17:49:43,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617026586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647589641] [2022-03-20 17:49:43,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:43,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:43,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:43,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:49:44,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 17:49:44,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:44,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 17:49:44,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:49:44,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:49:44,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647589641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:44,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:49:44,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-20 17:49:44,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945715449] [2022-03-20 17:49:44,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945715449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:44,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:44,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:49:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106036796] [2022-03-20 17:49:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:44,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:49:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:49:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:49:44,152 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:44,196 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-03-20 17:49:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:49:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2022-03-20 17:49:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:44,199 INFO L225 Difference]: With dead ends: 55 [2022-03-20 17:49:44,199 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 17:49:44,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:49:44,201 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:44,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 154 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:49:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 17:49:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-03-20 17:49:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-03-20 17:49:44,215 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-03-20 17:49:44,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:44,215 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-03-20 17:49:44,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-03-20 17:49:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:49:44,216 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:44,216 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, 1] [2022-03-20 17:49:44,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:44,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:44,417 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 1 times [2022-03-20 17:49:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:44,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015560693] [2022-03-20 17:49:44,419 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:44,420 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 2 times [2022-03-20 17:49:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:44,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141916545] [2022-03-20 17:49:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:44,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:49:44,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141916545] [2022-03-20 17:49:44,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141916545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837669793] [2022-03-20 17:49:44,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:44,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:44,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:44,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:44,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:49:44,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:44,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 17:49:44,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:49:44,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:49:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837669793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:44,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:49:44,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 17:49:44,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015560693] [2022-03-20 17:49:44,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015560693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:44,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:44,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:49:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300515243] [2022-03-20 17:49:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:44,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:49:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:49:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:49:44,632 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:44,659 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-03-20 17:49:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:49:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 17:49:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:44,661 INFO L225 Difference]: With dead ends: 100 [2022-03-20 17:49:44,661 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 17:49:44,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:49:44,662 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:44,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 69 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:49:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 17:49:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-03-20 17:49:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-03-20 17:49:44,671 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2022-03-20 17:49:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:44,671 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-03-20 17:49:44,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-03-20 17:49:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:49:44,672 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:44,672 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:44,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:44,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 17:49:44,895 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 1 times [2022-03-20 17:49:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1587052454] [2022-03-20 17:49:44,897 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:44,897 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 2 times [2022-03-20 17:49:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:44,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179279464] [2022-03-20 17:49:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:44,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 17:49:44,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:44,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179279464] [2022-03-20 17:49:44,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179279464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:44,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436099031] [2022-03-20 17:49:44,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:44,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:44,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:49:45,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:45,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:49:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:45,106 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 11 treesize of output 7 [2022-03-20 17:49:45,207 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 15 treesize of output 7 [2022-03-20 17:49:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:49:45,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:49:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436099031] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:45,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:49:45,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-20 17:49:45,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:45,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1587052454] [2022-03-20 17:49:45,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1587052454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:45,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:45,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:49:45,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826151027] [2022-03-20 17:49:45,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:45,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:49:45,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:49:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:49:45,359 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:45,452 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-03-20 17:49:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:49:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 29 [2022-03-20 17:49:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:45,455 INFO L225 Difference]: With dead ends: 67 [2022-03-20 17:49:45,455 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 17:49:45,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:49:45,459 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:45,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:49:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 17:49:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 17:49:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-03-20 17:49:45,475 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2022-03-20 17:49:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:45,475 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-03-20 17:49:45,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-03-20 17:49:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:49:45,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:45,477 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, 1] [2022-03-20 17:49:45,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:45,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:45,691 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 1 times [2022-03-20 17:49:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:45,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1693670574] [2022-03-20 17:49:45,693 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:45,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:45,693 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 2 times [2022-03-20 17:49:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:45,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957903843] [2022-03-20 17:49:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:45,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:49:45,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:45,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957903843] [2022-03-20 17:49:45,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957903843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546653205] [2022-03-20 17:49:45,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:45,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:45,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:45,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:45,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:49:45,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:49:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:45,859 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 11 treesize of output 7 [2022-03-20 17:49:45,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:49:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 17:49:45,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 17:49:46,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546653205] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:46,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:49:46,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-20 17:49:46,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:46,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1693670574] [2022-03-20 17:49:46,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1693670574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:46,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:46,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:49:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372153792] [2022-03-20 17:49:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:46,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:49:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:49:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:49:46,084 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:46,193 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-03-20 17:49:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:49:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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 30 [2022-03-20 17:49:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:46,194 INFO L225 Difference]: With dead ends: 72 [2022-03-20 17:49:46,194 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 17:49:46,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:49:46,198 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:46,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 17:49:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-03-20 17:49:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-20 17:49:46,212 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2022-03-20 17:49:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:46,212 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-20 17:49:46,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-20 17:49:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:49:46,213 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:46,213 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:46,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:46,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:46,427 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 1 times [2022-03-20 17:49:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140114426] [2022-03-20 17:49:46,430 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:46,430 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 2 times [2022-03-20 17:49:46,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:46,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974632956] [2022-03-20 17:49:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:46,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:46,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:49:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974632956] [2022-03-20 17:49:46,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974632956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191083678] [2022-03-20 17:49:46,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:46,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:46,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:46,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:49:46,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:49:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:49:46,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:49:46,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191083678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:46,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:46,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2022-03-20 17:49:46,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:46,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2140114426] [2022-03-20 17:49:46,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2140114426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:46,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:46,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:49:46,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182285043] [2022-03-20 17:49:46,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:46,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:49:46,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:49:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:49:46,708 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:46,843 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2022-03-20 17:49:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:49:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 31 [2022-03-20 17:49:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:46,845 INFO L225 Difference]: With dead ends: 133 [2022-03-20 17:49:46,845 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 17:49:46,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:49:46,846 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 95 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:46,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 40 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 17:49:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2022-03-20 17:49:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-03-20 17:49:46,867 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 31 [2022-03-20 17:49:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:46,867 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-03-20 17:49:46,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-03-20 17:49:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:49:46,868 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:46,868 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:46,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 17:49:47,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:47,076 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:47,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1557440111, now seen corresponding path program 3 times [2022-03-20 17:49:47,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:47,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203407289] [2022-03-20 17:49:47,078 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:47,078 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1557440111, now seen corresponding path program 4 times [2022-03-20 17:49:47,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:47,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305559577] [2022-03-20 17:49:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:47,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:49:47,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:47,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305559577] [2022-03-20 17:49:47,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305559577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:47,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045690995] [2022-03-20 17:49:47,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:49:47,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:47,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:47,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:47,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:49:47,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:49:47,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 17:49:47,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:49:47,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:49:47,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045690995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:47,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:47,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-20 17:49:47,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:47,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203407289] [2022-03-20 17:49:47,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203407289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:47,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:47,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:49:47,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241111246] [2022-03-20 17:49:47,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:47,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:49:47,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:49:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:49:47,374 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:47,537 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2022-03-20 17:49:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:49:47,537 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 33 [2022-03-20 17:49:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:47,539 INFO L225 Difference]: With dead ends: 160 [2022-03-20 17:49:47,539 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 17:49:47,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:49:47,540 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:47,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 45 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 17:49:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 51. [2022-03-20 17:49:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-03-20 17:49:47,554 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 33 [2022-03-20 17:49:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:47,554 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-03-20 17:49:47,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-03-20 17:49:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:49:47,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:47,556 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:47,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:47,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:47,772 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1767228433, now seen corresponding path program 5 times [2022-03-20 17:49:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438411773] [2022-03-20 17:49:47,773 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:47,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1767228433, now seen corresponding path program 6 times [2022-03-20 17:49:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:47,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722244505] [2022-03-20 17:49:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:47,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:49:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:47,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722244505] [2022-03-20 17:49:47,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722244505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549534321] [2022-03-20 17:49:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:49:47,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:47,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:47,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:49:47,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:49:47,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 17:49:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 17:49:48,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 17:49:48,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549534321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:48,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:48,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 13 [2022-03-20 17:49:48,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438411773] [2022-03-20 17:49:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438411773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:49:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788531331] [2022-03-20 17:49:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:48,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:49:48,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:49:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:49:48,085 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:48,310 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2022-03-20 17:49:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:49:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 35 [2022-03-20 17:49:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:48,311 INFO L225 Difference]: With dead ends: 187 [2022-03-20 17:49:48,312 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 17:49:48,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:49:48,313 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:48,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 72 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 17:49:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 53. [2022-03-20 17:49:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-03-20 17:49:48,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 35 [2022-03-20 17:49:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:48,326 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-03-20 17:49:48,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-03-20 17:49:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:49:48,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:48,327 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:48,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:48,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:48,544 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:48,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1510342963, now seen corresponding path program 7 times [2022-03-20 17:49:48,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:48,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [566095052] [2022-03-20 17:49:48,546 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:48,546 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1510342963, now seen corresponding path program 8 times [2022-03-20 17:49:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:48,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707052265] [2022-03-20 17:49:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:48,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 17:49:48,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:48,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707052265] [2022-03-20 17:49:48,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707052265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:48,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162163575] [2022-03-20 17:49:48,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:48,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:48,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:48,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:48,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:49:48,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 17:49:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 17:49:48,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 17:49:48,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162163575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:48,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:48,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 10] total 19 [2022-03-20 17:49:48,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:48,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [566095052] [2022-03-20 17:49:48,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [566095052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:48,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:48,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:48,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956707439] [2022-03-20 17:49:48,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:48,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:49:48,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:49:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:49:48,962 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:49,302 INFO L93 Difference]: Finished difference Result 214 states and 291 transitions. [2022-03-20 17:49:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:49:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 37 [2022-03-20 17:49:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:49,308 INFO L225 Difference]: With dead ends: 214 [2022-03-20 17:49:49,308 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 17:49:49,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:49:49,309 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 238 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:49,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 74 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:49:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 17:49:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 55. [2022-03-20 17:49:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-03-20 17:49:49,324 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 37 [2022-03-20 17:49:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:49,324 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-03-20 17:49:49,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-03-20 17:49:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 17:49:49,325 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:49,325 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:49,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:49,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 17:49:49,540 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash 543457835, now seen corresponding path program 9 times [2022-03-20 17:49:49,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:49,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [277185151] [2022-03-20 17:49:49,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:49,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash 543457835, now seen corresponding path program 10 times [2022-03-20 17:49:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:49,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148615865] [2022-03-20 17:49:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:49:49,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:49,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148615865] [2022-03-20 17:49:49,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148615865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:49,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452102314] [2022-03-20 17:49:49,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:49:49,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:49,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:49,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:49:49,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:49:49,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:49:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 17:49:49,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:49:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452102314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:49,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-20 17:49:49,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:49,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [277185151] [2022-03-20 17:49:49,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [277185151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:49,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:49,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:49:49,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682373139] [2022-03-20 17:49:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:49,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:49:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:49:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:49:49,822 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:49,929 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-03-20 17:49:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:49:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 39 [2022-03-20 17:49:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:49,930 INFO L225 Difference]: With dead ends: 110 [2022-03-20 17:49:49,930 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 17:49:49,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:49:49,931 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:49,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 17:49:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-03-20 17:49:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-03-20 17:49:49,950 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 39 [2022-03-20 17:49:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:49,950 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-03-20 17:49:49,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-03-20 17:49:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 17:49:49,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:49,951 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:49,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:50,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:50,172 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 11 times [2022-03-20 17:49:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:50,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545120473] [2022-03-20 17:49:50,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:50,173 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 12 times [2022-03-20 17:49:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:50,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463538652] [2022-03-20 17:49:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:50,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:49:50,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463538652] [2022-03-20 17:49:50,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463538652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092934855] [2022-03-20 17:49:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:49:50,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:50,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:50,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 17:49:50,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:49:50,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:50,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 17:49:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:49:50,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:49:50,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092934855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:50,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:50,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-03-20 17:49:50,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545120473] [2022-03-20 17:49:50,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545120473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:50,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:50,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:49:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556769261] [2022-03-20 17:49:50,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:50,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:49:50,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:49:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:49:50,581 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:50,875 INFO L93 Difference]: Finished difference Result 255 states and 333 transitions. [2022-03-20 17:49:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:49:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 42 [2022-03-20 17:49:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:50,876 INFO L225 Difference]: With dead ends: 255 [2022-03-20 17:49:50,877 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 17:49:50,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:49:50,878 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:50,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 62 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:49:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 17:49:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 77. [2022-03-20 17:49:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 72 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-03-20 17:49:50,906 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 42 [2022-03-20 17:49:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:50,906 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-03-20 17:49:50,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-03-20 17:49:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 17:49:50,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:50,907 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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] [2022-03-20 17:49:50,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:51,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 17:49:51,120 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 13 times [2022-03-20 17:49:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718359916] [2022-03-20 17:49:51,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:51,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 14 times [2022-03-20 17:49:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:51,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178163003] [2022-03-20 17:49:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:49:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178163003] [2022-03-20 17:49:51,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178163003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:51,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655924521] [2022-03-20 17:49:51,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:51,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:51,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:51,236 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:51,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 17:49:51,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:49:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:51,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:49:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 17:49:51,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:51,694 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:49:51,695 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 [2022-03-20 17:49:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:49:51,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655924521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:51,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:51,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2022-03-20 17:49:51,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718359916] [2022-03-20 17:49:51,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718359916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:51,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:51,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:51,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813765528] [2022-03-20 17:49:51,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:51,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:49:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:51,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:49:51,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:49:51,759 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:52,128 INFO L93 Difference]: Finished difference Result 270 states and 352 transitions. [2022-03-20 17:49:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:49:52,130 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 46 [2022-03-20 17:49:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:52,131 INFO L225 Difference]: With dead ends: 270 [2022-03-20 17:49:52,131 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 17:49:52,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:49:52,132 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:52,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 100 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:49:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 17:49:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 79. [2022-03-20 17:49:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-03-20 17:49:52,172 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 46 [2022-03-20 17:49:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:52,172 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-03-20 17:49:52,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-03-20 17:49:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 17:49:52,173 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:52,173 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2022-03-20 17:49:52,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:52,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 17:49:52,396 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1875303096, now seen corresponding path program 15 times [2022-03-20 17:49:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:52,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [211494469] [2022-03-20 17:49:52,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:52,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1875303096, now seen corresponding path program 16 times [2022-03-20 17:49:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021807667] [2022-03-20 17:49:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:52,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:49:52,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021807667] [2022-03-20 17:49:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021807667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135431817] [2022-03-20 17:49:52,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:49:52,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:52,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:52,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 17:49:52,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:49:52,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:49:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:52,799 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 [2022-03-20 17:49:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 17:49:52,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:52,944 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:49:52,945 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 [2022-03-20 17:49:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 17:49:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135431817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:53,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-03-20 17:49:53,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [211494469] [2022-03-20 17:49:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [211494469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:53,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:49:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775489096] [2022-03-20 17:49:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:53,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:49:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:49:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:49:53,012 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:53,485 INFO L93 Difference]: Finished difference Result 317 states and 415 transitions. [2022-03-20 17:49:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:49:53,486 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 48 [2022-03-20 17:49:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:53,487 INFO L225 Difference]: With dead ends: 317 [2022-03-20 17:49:53,487 INFO L226 Difference]: Without dead ends: 291 [2022-03-20 17:49:53,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:49:53,488 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 176 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:53,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 124 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:49:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-20 17:49:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 81. [2022-03-20 17:49:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 76 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2022-03-20 17:49:53,516 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 48 [2022-03-20 17:49:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:53,517 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2022-03-20 17:49:53,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2022-03-20 17:49:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 17:49:53,517 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:53,517 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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] [2022-03-20 17:49:53,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:53,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 17:49:53,731 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 17 times [2022-03-20 17:49:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:53,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532250023] [2022-03-20 17:49:53,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:53,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 18 times [2022-03-20 17:49:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:53,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944366281] [2022-03-20 17:49:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:49:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944366281] [2022-03-20 17:49:53,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944366281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800786287] [2022-03-20 17:49:53,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:49:53,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:53,846 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:53,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 17:49:53,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:49:53,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 17:49:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:49:54,138 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:49:54,138 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 17 treesize of output 10 [2022-03-20 17:49:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 17:49:54,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 17:49:54,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800786287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:54,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 17:49:54,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-03-20 17:49:54,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:54,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532250023] [2022-03-20 17:49:54,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532250023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:54,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:54,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:49:54,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346831176] [2022-03-20 17:49:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:54,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:49:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:49:54,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:49:54,172 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:54,270 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2022-03-20 17:49:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:49:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 50 [2022-03-20 17:49:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:54,271 INFO L225 Difference]: With dead ends: 125 [2022-03-20 17:49:54,271 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 17:49:54,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:49:54,272 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:54,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-03-20 17:49:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 17:49:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2022-03-20 17:49:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-03-20 17:49:54,318 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 50 [2022-03-20 17:49:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:54,318 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-03-20 17:49:54,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-03-20 17:49:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:49:54,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:54,319 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 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, 1] [2022-03-20 17:49:54,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:54,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 17:49:54,535 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 1 times [2022-03-20 17:49:54,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:54,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [279960416] [2022-03-20 17:49:54,537 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:54,537 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 2 times [2022-03-20 17:49:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:54,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246852124] [2022-03-20 17:49:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:49:54,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246852124] [2022-03-20 17:49:54,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246852124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351203167] [2022-03-20 17:49:54,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:54,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:54,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:54,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:54,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 17:49:54,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:54,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:49:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 17:49:55,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:49:55,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351203167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:55,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:55,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-03-20 17:49:55,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [279960416] [2022-03-20 17:49:55,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [279960416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:55,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:55,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:49:55,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949415330] [2022-03-20 17:49:55,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:55,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:49:55,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:49:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:49:55,219 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:55,876 INFO L93 Difference]: Finished difference Result 188 states and 243 transitions. [2022-03-20 17:49:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:49:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 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 51 [2022-03-20 17:49:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:55,877 INFO L225 Difference]: With dead ends: 188 [2022-03-20 17:49:55,877 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 17:49:55,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:49:55,879 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 195 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:55,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 144 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:49:55,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 17:49:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 116. [2022-03-20 17:49:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2022-03-20 17:49:55,940 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 51 [2022-03-20 17:49:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:55,940 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2022-03-20 17:49:55,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:49:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2022-03-20 17:49:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:49:55,941 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:55,941 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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, 1, 1, 1] [2022-03-20 17:49:55,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:56,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:56,151 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 1 times [2022-03-20 17:49:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128021389] [2022-03-20 17:49:56,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:56,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 2 times [2022-03-20 17:49:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:56,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156478493] [2022-03-20 17:49:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:56,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 17:49:56,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:56,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156478493] [2022-03-20 17:49:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156478493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:56,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068665345] [2022-03-20 17:49:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:56,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:56,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 17:49:56,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:56,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 17:49:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:56,978 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:49:56,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-20 17:49:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 17:49:57,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:02,373 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-20 17:50:02,373 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 [2022-03-20 17:50:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:50:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068665345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:02,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:02,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 29 [2022-03-20 17:50:02,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:02,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128021389] [2022-03-20 17:50:02,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128021389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:02,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:02,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:50:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183574759] [2022-03-20 17:50:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:02,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:50:02,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:50:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=690, Unknown=10, NotChecked=0, Total=812 [2022-03-20 17:50:02,550 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-03-20 17:50:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:02,923 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2022-03-20 17:50:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:50:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 51 [2022-03-20 17:50:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:02,924 INFO L225 Difference]: With dead ends: 197 [2022-03-20 17:50:02,924 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 17:50:02,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=153, Invalid=1027, Unknown=10, NotChecked=0, Total=1190 [2022-03-20 17:50:02,926 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:02,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:50:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 17:50:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-03-20 17:50:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.275) internal successors, (153), 120 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2022-03-20 17:50:02,996 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 51 [2022-03-20 17:50:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:02,996 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2022-03-20 17:50:02,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-03-20 17:50:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2022-03-20 17:50:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:50:02,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:02,997 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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, 1, 1, 1] [2022-03-20 17:50:03,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:03,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 17:50:03,211 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 1 times [2022-03-20 17:50:03,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:03,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374702909] [2022-03-20 17:50:03,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:03,214 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 2 times [2022-03-20 17:50:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286290978] [2022-03-20 17:50:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:03,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:03,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 17:50:03,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:03,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286290978] [2022-03-20 17:50:03,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286290978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:03,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619481473] [2022-03-20 17:50:03,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:03,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:03,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:03,567 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:03,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 17:50:03,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:03,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 17:50:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:04,068 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:50:04,069 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 [2022-03-20 17:50:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 17:50:04,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:06,329 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 17:50:06,329 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 [2022-03-20 17:50:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:50:06,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619481473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:06,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:06,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 29 [2022-03-20 17:50:06,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374702909] [2022-03-20 17:50:06,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374702909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:06,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:06,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:50:06,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571152520] [2022-03-20 17:50:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:06,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:50:06,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:50:06,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=692, Unknown=4, NotChecked=0, Total=812 [2022-03-20 17:50:06,477 INFO L87 Difference]: Start difference. First operand 125 states and 157 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:06,894 INFO L93 Difference]: Finished difference Result 162 states and 203 transitions. [2022-03-20 17:50:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:50:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 51 [2022-03-20 17:50:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:06,895 INFO L225 Difference]: With dead ends: 162 [2022-03-20 17:50:06,895 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 17:50:06,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=164, Invalid=1022, Unknown=4, NotChecked=0, Total=1190 [2022-03-20 17:50:06,896 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:06,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 58 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:50:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 17:50:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-03-20 17:50:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2022-03-20 17:50:06,967 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 51 [2022-03-20 17:50:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:06,967 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2022-03-20 17:50:06,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2022-03-20 17:50:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:50:06,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:06,968 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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, 1, 1, 1] [2022-03-20 17:50:06,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:07,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 17:50:07,183 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-03-20 17:50:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1597257831] [2022-03-20 17:50:07,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:07,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 2 times [2022-03-20 17:50:07,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:07,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913788039] [2022-03-20 17:50:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:07,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:07,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 17:50:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913788039] [2022-03-20 17:50:07,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913788039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834607960] [2022-03-20 17:50:07,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:07,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:07,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:07,632 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:07,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 17:50:07,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:07,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:07,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 17:50:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:07,965 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:50:07,965 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 [2022-03-20 17:50:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:50:07,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:08,124 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-20 17:50:08,125 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 32 treesize of output 65 [2022-03-20 17:50:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:50:08,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834607960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:08,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2022-03-20 17:50:08,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1597257831] [2022-03-20 17:50:08,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1597257831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:08,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:50:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216747319] [2022-03-20 17:50:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:08,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:50:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:50:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:50:08,230 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-03-20 17:50:08,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:08,730 INFO L93 Difference]: Finished difference Result 372 states and 477 transitions. [2022-03-20 17:50:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:50:08,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-03-20 17:50:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:08,732 INFO L225 Difference]: With dead ends: 372 [2022-03-20 17:50:08,732 INFO L226 Difference]: Without dead ends: 318 [2022-03-20 17:50:08,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:50:08,733 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 192 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:08,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 43 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-20 17:50:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 187. [2022-03-20 17:50:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.2527472527472527) internal successors, (228), 182 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 232 transitions. [2022-03-20 17:50:08,811 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 232 transitions. Word has length 51 [2022-03-20 17:50:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:08,811 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 232 transitions. [2022-03-20 17:50:08,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-03-20 17:50:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 232 transitions. [2022-03-20 17:50:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:50:08,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:08,812 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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, 1, 1, 1] [2022-03-20 17:50:08,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:09,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:09,013 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 3 times [2022-03-20 17:50:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:09,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95579419] [2022-03-20 17:50:09,014 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:09,015 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 4 times [2022-03-20 17:50:09,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:09,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453271887] [2022-03-20 17:50:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:09,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:50:09,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:09,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453271887] [2022-03-20 17:50:09,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453271887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:09,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185567556] [2022-03-20 17:50:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:09,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:09,664 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:09,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 17:50:09,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 17:50:09,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:10,101 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:50:10,101 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 [2022-03-20 17:50:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:50:10,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:10,310 INFO L356 Elim1Store]: treesize reduction 29, result has 68.1 percent of original size [2022-03-20 17:50:10,310 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 34 treesize of output 69 [2022-03-20 17:50:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:50:10,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185567556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:10,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:10,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 31 [2022-03-20 17:50:10,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:10,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95579419] [2022-03-20 17:50:10,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95579419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:10,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:10,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:50:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979603350] [2022-03-20 17:50:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:10,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:50:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:50:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:50:10,460 INFO L87 Difference]: Start difference. First operand 187 states and 232 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:11,923 INFO L93 Difference]: Finished difference Result 856 states and 1103 transitions. [2022-03-20 17:50:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 17:50:11,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 51 [2022-03-20 17:50:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:11,926 INFO L225 Difference]: With dead ends: 856 [2022-03-20 17:50:11,927 INFO L226 Difference]: Without dead ends: 670 [2022-03-20 17:50:11,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=642, Invalid=2550, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 17:50:11,928 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 291 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:11,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 54 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:50:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-03-20 17:50:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 357. [2022-03-20 17:50:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.2897727272727273) internal successors, (454), 352 states have internal predecessors, (454), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 458 transitions. [2022-03-20 17:50:12,097 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 458 transitions. Word has length 51 [2022-03-20 17:50:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:12,097 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 458 transitions. [2022-03-20 17:50:12,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 458 transitions. [2022-03-20 17:50:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:50:12,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:12,098 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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, 1, 1, 1] [2022-03-20 17:50:12,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:12,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:12,301 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-03-20 17:50:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245943082] [2022-03-20 17:50:12,302 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:12,302 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 2 times [2022-03-20 17:50:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:12,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327337224] [2022-03-20 17:50:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 17:50:12,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:12,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327337224] [2022-03-20 17:50:12,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327337224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:12,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575928578] [2022-03-20 17:50:12,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:12,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:12,704 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:12,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 17:50:12,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:12,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:12,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 17:50:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:12,991 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:50:12,991 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 [2022-03-20 17:50:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:50:13,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:13,134 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 17:50:13,134 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 [2022-03-20 17:50:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:50:13,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575928578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:13,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:13,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2022-03-20 17:50:13,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245943082] [2022-03-20 17:50:13,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245943082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:13,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:13,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:50:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920451009] [2022-03-20 17:50:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:13,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:50:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:50:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:50:13,225 INFO L87 Difference]: Start difference. First operand 357 states and 458 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-03-20 17:50:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:13,787 INFO L93 Difference]: Finished difference Result 579 states and 760 transitions. [2022-03-20 17:50:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:50:13,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-03-20 17:50:13,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:13,790 INFO L225 Difference]: With dead ends: 579 [2022-03-20 17:50:13,790 INFO L226 Difference]: Without dead ends: 535 [2022-03-20 17:50:13,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:50:13,791 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:13,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 51 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-20 17:50:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 367. [2022-03-20 17:50:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.281767955801105) internal successors, (464), 362 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 468 transitions. [2022-03-20 17:50:13,983 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 468 transitions. Word has length 51 [2022-03-20 17:50:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:13,983 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 468 transitions. [2022-03-20 17:50:13,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-03-20 17:50:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 468 transitions. [2022-03-20 17:50:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:50:13,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:13,984 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 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, 1, 1, 1] [2022-03-20 17:50:14,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:14,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:14,195 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 3 times [2022-03-20 17:50:14,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294595144] [2022-03-20 17:50:14,197 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:14,197 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 4 times [2022-03-20 17:50:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:14,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184790493] [2022-03-20 17:50:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:14,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:50:14,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184790493] [2022-03-20 17:50:14,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184790493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:14,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305808512] [2022-03-20 17:50:14,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:14,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:14,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:14,680 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:14,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 17:50:14,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 17:50:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:14,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:50:14,994 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 [2022-03-20 17:50:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 17:50:15,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:16,697 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 17:50:16,697 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 [2022-03-20 17:50:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:50:16,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305808512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:16,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:16,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-20 17:50:16,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294595144] [2022-03-20 17:50:16,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294595144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:16,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:16,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:50:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384599647] [2022-03-20 17:50:16,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:16,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:50:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:50:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=568, Unknown=3, NotChecked=0, Total=702 [2022-03-20 17:50:16,828 INFO L87 Difference]: Start difference. First operand 367 states and 468 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:17,555 INFO L93 Difference]: Finished difference Result 765 states and 982 transitions. [2022-03-20 17:50:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:50:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 51 [2022-03-20 17:50:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:17,558 INFO L225 Difference]: With dead ends: 765 [2022-03-20 17:50:17,558 INFO L226 Difference]: Without dead ends: 496 [2022-03-20 17:50:17,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=321, Invalid=1236, Unknown=3, NotChecked=0, Total=1560 [2022-03-20 17:50:17,559 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 199 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:17,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 50 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-20 17:50:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 394. [2022-03-20 17:50:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.275064267352185) internal successors, (496), 389 states have internal predecessors, (496), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 500 transitions. [2022-03-20 17:50:17,780 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 500 transitions. Word has length 51 [2022-03-20 17:50:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:17,781 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 500 transitions. [2022-03-20 17:50:17,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 500 transitions. [2022-03-20 17:50:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 17:50:17,782 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:17,782 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 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, 1, 1, 1, 1] [2022-03-20 17:50:17,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:17,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 17:50:17,996 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 1 times [2022-03-20 17:50:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2004104874] [2022-03-20 17:50:17,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:17,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-03-20 17:50:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:17,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817327244] [2022-03-20 17:50:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-03-20 17:50:18,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817327244] [2022-03-20 17:50:18,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817327244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156005635] [2022-03-20 17:50:18,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:18,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:18,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:18,052 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:18,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 17:50:18,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:18,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:18,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 17:50:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 17:50:18,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-03-20 17:50:18,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156005635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:18,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:18,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-03-20 17:50:18,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:18,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2004104874] [2022-03-20 17:50:18,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2004104874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:18,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:18,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:50:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233308878] [2022-03-20 17:50:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:18,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:50:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:50:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:50:18,350 INFO L87 Difference]: Start difference. First operand 394 states and 500 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:18,633 INFO L93 Difference]: Finished difference Result 733 states and 928 transitions. [2022-03-20 17:50:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:50:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 54 [2022-03-20 17:50:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:18,634 INFO L225 Difference]: With dead ends: 733 [2022-03-20 17:50:18,634 INFO L226 Difference]: Without dead ends: 382 [2022-03-20 17:50:18,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:50:18,635 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:18,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:50:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-20 17:50:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 354. [2022-03-20 17:50:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 1.186246418338109) internal successors, (414), 349 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 418 transitions. [2022-03-20 17:50:18,819 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 418 transitions. Word has length 54 [2022-03-20 17:50:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:18,819 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 418 transitions. [2022-03-20 17:50:18,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 418 transitions. [2022-03-20 17:50:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 17:50:18,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:18,820 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:18,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:19,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 17:50:19,020 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-03-20 17:50:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:19,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1498713782] [2022-03-20 17:50:19,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:19,022 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 4 times [2022-03-20 17:50:19,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:19,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256744520] [2022-03-20 17:50:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 17:50:19,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256744520] [2022-03-20 17:50:19,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256744520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47304218] [2022-03-20 17:50:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:19,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:19,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:19,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 17:50:19,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:19,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 17:50:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:19,809 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:50:19,809 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 [2022-03-20 17:50:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:50:19,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:22,540 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 17:50:22,540 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 48 treesize of output 37 [2022-03-20 17:50:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 17:50:22,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47304218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:22,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:22,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 16] total 37 [2022-03-20 17:50:22,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1498713782] [2022-03-20 17:50:22,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1498713782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:22,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:22,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:50:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271951965] [2022-03-20 17:50:22,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:22,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:50:22,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:50:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1154, Unknown=4, NotChecked=0, Total=1332 [2022-03-20 17:50:22,593 INFO L87 Difference]: Start difference. First operand 354 states and 418 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-03-20 17:50:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:22,982 INFO L93 Difference]: Finished difference Result 537 states and 620 transitions. [2022-03-20 17:50:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:50:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 60 [2022-03-20 17:50:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:22,983 INFO L225 Difference]: With dead ends: 537 [2022-03-20 17:50:22,983 INFO L226 Difference]: Without dead ends: 348 [2022-03-20 17:50:22,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=202, Invalid=1434, Unknown=4, NotChecked=0, Total=1640 [2022-03-20 17:50:22,985 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:22,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 55 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:50:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-20 17:50:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 284. [2022-03-20 17:50:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.1720430107526882) internal successors, (327), 279 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-03-20 17:50:23,124 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 60 [2022-03-20 17:50:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:23,124 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-03-20 17:50:23,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-03-20 17:50:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-03-20 17:50:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:50:23,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:23,125 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:23,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:23,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:23,326 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:23,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 5 times [2022-03-20 17:50:23,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:23,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1300081072] [2022-03-20 17:50:23,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:23,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 6 times [2022-03-20 17:50:23,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374384931] [2022-03-20 17:50:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:23,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 17:50:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:23,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374384931] [2022-03-20 17:50:23,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374384931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:23,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447066382] [2022-03-20 17:50:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:23,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:23,662 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:23,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 17:50:23,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:50:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:50:23,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:23,939 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 15 treesize of output 7 [2022-03-20 17:50:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:50:23,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:24,071 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:24,071 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 [2022-03-20 17:50:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:50:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447066382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:24,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 23 [2022-03-20 17:50:24,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1300081072] [2022-03-20 17:50:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1300081072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:24,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:50:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630585320] [2022-03-20 17:50:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:24,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:50:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:50:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:50:24,115 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-03-20 17:50:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:24,556 INFO L93 Difference]: Finished difference Result 338 states and 389 transitions. [2022-03-20 17:50:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:50:24,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-03-20 17:50:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:24,557 INFO L225 Difference]: With dead ends: 338 [2022-03-20 17:50:24,557 INFO L226 Difference]: Without dead ends: 262 [2022-03-20 17:50:24,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-03-20 17:50:24,558 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:24,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 42 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:50:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-20 17:50:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-03-20 17:50:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.1750972762645915) internal successors, (302), 257 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 306 transitions. [2022-03-20 17:50:24,685 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 306 transitions. Word has length 61 [2022-03-20 17:50:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:24,686 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 306 transitions. [2022-03-20 17:50:24,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-03-20 17:50:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 306 transitions. [2022-03-20 17:50:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 17:50:24,687 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:24,687 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 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] [2022-03-20 17:50:24,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:24,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:24,901 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:24,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 7 times [2022-03-20 17:50:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:24,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364379273] [2022-03-20 17:50:24,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:24,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 8 times [2022-03-20 17:50:24,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:24,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569856948] [2022-03-20 17:50:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:25,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:50:25,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569856948] [2022-03-20 17:50:25,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569856948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851528530] [2022-03-20 17:50:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:25,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:25,516 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:25,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 17:50:25,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:25,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:50:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:25,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:50:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 17:50:25,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:26,007 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:26,007 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 [2022-03-20 17:50:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:50:26,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851528530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:26,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:26,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11, 9] total 36 [2022-03-20 17:50:26,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:26,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364379273] [2022-03-20 17:50:26,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364379273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:26,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:26,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:50:26,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559536414] [2022-03-20 17:50:26,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:26,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:50:26,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:26,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:50:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:50:26,062 INFO L87 Difference]: Start difference. First operand 262 states and 306 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:27,687 INFO L93 Difference]: Finished difference Result 1095 states and 1285 transitions. [2022-03-20 17:50:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 17:50:27,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 17:50:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:27,690 INFO L225 Difference]: With dead ends: 1095 [2022-03-20 17:50:27,690 INFO L226 Difference]: Without dead ends: 922 [2022-03-20 17:50:27,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=501, Invalid=2805, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 17:50:27,692 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 272 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:27,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 93 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:50:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-03-20 17:50:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 375. [2022-03-20 17:50:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.164864864864865) internal successors, (431), 370 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 435 transitions. [2022-03-20 17:50:27,976 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 435 transitions. Word has length 62 [2022-03-20 17:50:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:27,976 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 435 transitions. [2022-03-20 17:50:27,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 435 transitions. [2022-03-20 17:50:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 17:50:27,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:27,978 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 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] [2022-03-20 17:50:27,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:28,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 17:50:28,191 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 9 times [2022-03-20 17:50:28,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:28,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859594236] [2022-03-20 17:50:28,193 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:28,193 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 10 times [2022-03-20 17:50:28,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:28,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178431261] [2022-03-20 17:50:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:50:28,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178431261] [2022-03-20 17:50:28,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178431261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091085693] [2022-03-20 17:50:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:28,418 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:28,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 17:50:28,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:28,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:50:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:28,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:50:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 17:50:28,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:28,869 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:28,870 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 [2022-03-20 17:50:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:50:28,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091085693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:28,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:28,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-03-20 17:50:28,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:28,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859594236] [2022-03-20 17:50:28,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859594236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:28,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:28,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:50:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685626748] [2022-03-20 17:50:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:28,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:50:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:50:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:50:28,912 INFO L87 Difference]: Start difference. First operand 375 states and 435 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-03-20 17:50:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:29,474 INFO L93 Difference]: Finished difference Result 507 states and 586 transitions. [2022-03-20 17:50:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:50:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 62 [2022-03-20 17:50:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:29,475 INFO L225 Difference]: With dead ends: 507 [2022-03-20 17:50:29,475 INFO L226 Difference]: Without dead ends: 502 [2022-03-20 17:50:29,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:50:29,476 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 112 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:29,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 68 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-03-20 17:50:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 370. [2022-03-20 17:50:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.167123287671233) internal successors, (426), 365 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 430 transitions. [2022-03-20 17:50:29,724 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 430 transitions. Word has length 62 [2022-03-20 17:50:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:29,724 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 430 transitions. [2022-03-20 17:50:29,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-03-20 17:50:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 430 transitions. [2022-03-20 17:50:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 17:50:29,725 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:29,725 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 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] [2022-03-20 17:50:29,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:29,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 17:50:29,926 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 11 times [2022-03-20 17:50:29,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:29,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494330874] [2022-03-20 17:50:29,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:29,927 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 12 times [2022-03-20 17:50:29,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595615204] [2022-03-20 17:50:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:29,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:50:30,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595615204] [2022-03-20 17:50:30,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595615204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926643327] [2022-03-20 17:50:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:30,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:30,017 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 17:50:30,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:50:30,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 17:50:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 17:50:30,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:30,469 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-03-20 17:50:30,469 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 [2022-03-20 17:50:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 17:50:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926643327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:30,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 14] total 29 [2022-03-20 17:50:30,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1494330874] [2022-03-20 17:50:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1494330874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:30,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:50:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693269545] [2022-03-20 17:50:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:30,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:50:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:50:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:50:30,713 INFO L87 Difference]: Start difference. First operand 370 states and 430 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:31,333 INFO L93 Difference]: Finished difference Result 739 states and 855 transitions. [2022-03-20 17:50:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:50:31,333 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 63 [2022-03-20 17:50:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:31,335 INFO L225 Difference]: With dead ends: 739 [2022-03-20 17:50:31,335 INFO L226 Difference]: Without dead ends: 690 [2022-03-20 17:50:31,336 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:50:31,336 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:31,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 67 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:50:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-03-20 17:50:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 370. [2022-03-20 17:50:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.158904109589041) internal successors, (423), 365 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 427 transitions. [2022-03-20 17:50:31,564 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 427 transitions. Word has length 63 [2022-03-20 17:50:31,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:31,564 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 427 transitions. [2022-03-20 17:50:31,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 427 transitions. [2022-03-20 17:50:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 17:50:31,565 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:31,565 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2022-03-20 17:50:31,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:31,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 17:50:31,779 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 13 times [2022-03-20 17:50:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179219959] [2022-03-20 17:50:31,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:31,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 14 times [2022-03-20 17:50:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:31,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209678977] [2022-03-20 17:50:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:31,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:31,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:50:31,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209678977] [2022-03-20 17:50:31,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209678977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509560930] [2022-03-20 17:50:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:31,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:31,890 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:31,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 17:50:31,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:31,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:50:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:32,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:50:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:50:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:32,586 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:32,587 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 [2022-03-20 17:50:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:50:32,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509560930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:32,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:32,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2022-03-20 17:50:32,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:32,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179219959] [2022-03-20 17:50:32,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179219959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:32,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:32,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:50:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127694467] [2022-03-20 17:50:32,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:32,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:50:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:50:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:50:32,677 INFO L87 Difference]: Start difference. First operand 370 states and 427 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:33,573 INFO L93 Difference]: Finished difference Result 1028 states and 1191 transitions. [2022-03-20 17:50:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:50:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 65 [2022-03-20 17:50:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:33,576 INFO L225 Difference]: With dead ends: 1028 [2022-03-20 17:50:33,576 INFO L226 Difference]: Without dead ends: 979 [2022-03-20 17:50:33,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:50:33,577 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 181 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:33,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 81 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-03-20 17:50:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 394. [2022-03-20 17:50:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.1568123393316196) internal successors, (450), 389 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 454 transitions. [2022-03-20 17:50:33,810 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 454 transitions. Word has length 65 [2022-03-20 17:50:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:33,810 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 454 transitions. [2022-03-20 17:50:33,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 454 transitions. [2022-03-20 17:50:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 17:50:33,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:33,812 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:50:33,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:34,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 17:50:34,027 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 15 times [2022-03-20 17:50:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1570250634] [2022-03-20 17:50:34,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:34,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 16 times [2022-03-20 17:50:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:34,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062949024] [2022-03-20 17:50:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:34,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:50:34,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:34,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062949024] [2022-03-20 17:50:34,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062949024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:34,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926730965] [2022-03-20 17:50:34,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:34,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:34,153 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:34,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 17:50:34,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:34,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:34,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:50:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:34,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:50:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:50:34,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:34,781 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:34,781 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 [2022-03-20 17:50:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 17:50:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926730965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:34,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:34,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2022-03-20 17:50:34,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1570250634] [2022-03-20 17:50:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1570250634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:34,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:34,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:50:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033934464] [2022-03-20 17:50:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:34,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:50:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:50:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:50:34,856 INFO L87 Difference]: Start difference. First operand 394 states and 454 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:36,110 INFO L93 Difference]: Finished difference Result 1296 states and 1503 transitions. [2022-03-20 17:50:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:50:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 67 [2022-03-20 17:50:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:36,113 INFO L225 Difference]: With dead ends: 1296 [2022-03-20 17:50:36,114 INFO L226 Difference]: Without dead ends: 1247 [2022-03-20 17:50:36,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:50:36,115 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:36,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 110 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:50:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-20 17:50:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 396. [2022-03-20 17:50:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 391 states have (on average 1.1585677749360614) internal successors, (453), 391 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 457 transitions. [2022-03-20 17:50:36,368 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 457 transitions. Word has length 67 [2022-03-20 17:50:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:36,368 INFO L478 AbstractCegarLoop]: Abstraction has 396 states and 457 transitions. [2022-03-20 17:50:36,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 457 transitions. [2022-03-20 17:50:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 17:50:36,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:36,370 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:50:36,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:36,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:36,583 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 17 times [2022-03-20 17:50:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918968291] [2022-03-20 17:50:36,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:36,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:36,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 18 times [2022-03-20 17:50:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:36,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723722982] [2022-03-20 17:50:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:36,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:36,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:50:36,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723722982] [2022-03-20 17:50:36,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723722982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463037747] [2022-03-20 17:50:36,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:36,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:36,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:36,732 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 17:50:36,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:50:36,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:50:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:37,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:50:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:50:37,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:37,509 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:37,509 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 [2022-03-20 17:50:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 17:50:37,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463037747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:37,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:37,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2022-03-20 17:50:37,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918968291] [2022-03-20 17:50:37,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918968291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:37,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:37,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:50:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506558838] [2022-03-20 17:50:37,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:37,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:50:37,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:50:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:50:37,603 INFO L87 Difference]: Start difference. First operand 396 states and 457 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:39,145 INFO L93 Difference]: Finished difference Result 1564 states and 1815 transitions. [2022-03-20 17:50:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:50:39,145 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 69 [2022-03-20 17:50:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:39,148 INFO L225 Difference]: With dead ends: 1564 [2022-03-20 17:50:39,148 INFO L226 Difference]: Without dead ends: 1515 [2022-03-20 17:50:39,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:50:39,149 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 228 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:39,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 134 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:50:39,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-03-20 17:50:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 398. [2022-03-20 17:50:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.1603053435114503) internal successors, (456), 393 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 460 transitions. [2022-03-20 17:50:39,458 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 460 transitions. Word has length 69 [2022-03-20 17:50:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:39,458 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 460 transitions. [2022-03-20 17:50:39,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 460 transitions. [2022-03-20 17:50:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 17:50:39,459 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:39,460 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:50:39,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:39,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:39,672 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:39,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 19 times [2022-03-20 17:50:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:39,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690451234] [2022-03-20 17:50:39,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:39,674 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 20 times [2022-03-20 17:50:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550164709] [2022-03-20 17:50:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:39,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:50:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550164709] [2022-03-20 17:50:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550164709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799754419] [2022-03-20 17:50:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:39,848 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:39,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 17:50:39,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:39,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:50:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:40,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:50:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 17:50:40,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:40,617 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:50:40,617 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 [2022-03-20 17:50:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 17:50:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799754419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:40,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:40,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2022-03-20 17:50:40,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:40,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690451234] [2022-03-20 17:50:40,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690451234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:40,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:40,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:50:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128699105] [2022-03-20 17:50:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:40,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:50:40,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:50:40,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-03-20 17:50:40,705 INFO L87 Difference]: Start difference. First operand 398 states and 460 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2022-03-20 17:50:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:42,577 INFO L93 Difference]: Finished difference Result 1832 states and 2127 transitions. [2022-03-20 17:50:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:50:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 71 [2022-03-20 17:50:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:42,581 INFO L225 Difference]: With dead ends: 1832 [2022-03-20 17:50:42,581 INFO L226 Difference]: Without dead ends: 1783 [2022-03-20 17:50:42,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=1572, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:50:42,582 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 269 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:42,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 146 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:50:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-20 17:50:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 400. [2022-03-20 17:50:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.1620253164556962) internal successors, (459), 395 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 463 transitions. [2022-03-20 17:50:42,848 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 463 transitions. Word has length 71 [2022-03-20 17:50:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:42,848 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 463 transitions. [2022-03-20 17:50:42,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2022-03-20 17:50:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 463 transitions. [2022-03-20 17:50:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:50:42,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:42,849 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:42,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:43,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 17:50:43,071 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 21 times [2022-03-20 17:50:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480390762] [2022-03-20 17:50:43,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:43,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 22 times [2022-03-20 17:50:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:43,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225819867] [2022-03-20 17:50:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 17:50:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225819867] [2022-03-20 17:50:43,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225819867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244478041] [2022-03-20 17:50:43,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:43,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:43,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:43,576 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:43,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 17:50:43,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:43,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:43,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:50:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:44,044 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:50:44,045 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 [2022-03-20 17:50:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:50:44,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:44,245 INFO L356 Elim1Store]: treesize reduction 29, result has 68.1 percent of original size [2022-03-20 17:50:44,246 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 34 treesize of output 69 [2022-03-20 17:50:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 17:50:44,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244478041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:44,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:44,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 29 [2022-03-20 17:50:44,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480390762] [2022-03-20 17:50:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480390762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:44,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:44,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:50:44,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189088937] [2022-03-20 17:50:44,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:44,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:50:44,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:50:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:50:44,373 INFO L87 Difference]: Start difference. First operand 400 states and 463 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) [2022-03-20 17:50:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:45,349 INFO L93 Difference]: Finished difference Result 770 states and 892 transitions. [2022-03-20 17:50:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:50:45,349 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 72 [2022-03-20 17:50:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:45,351 INFO L225 Difference]: With dead ends: 770 [2022-03-20 17:50:45,351 INFO L226 Difference]: Without dead ends: 716 [2022-03-20 17:50:45,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:50:45,353 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 201 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:45,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 67 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-20 17:50:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 569. [2022-03-20 17:50:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 564 states have (on average 1.1613475177304964) internal successors, (655), 564 states have internal predecessors, (655), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 659 transitions. [2022-03-20 17:50:45,752 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 659 transitions. Word has length 72 [2022-03-20 17:50:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:45,752 INFO L478 AbstractCegarLoop]: Abstraction has 569 states and 659 transitions. [2022-03-20 17:50:45,752 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) [2022-03-20 17:50:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 659 transitions. [2022-03-20 17:50:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:50:45,753 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:45,754 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:45,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:45,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:45,954 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 23 times [2022-03-20 17:50:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:45,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1071466423] [2022-03-20 17:50:45,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:45,955 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 24 times [2022-03-20 17:50:45,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:45,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599106804] [2022-03-20 17:50:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:45,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:46,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 17:50:46,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:46,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599106804] [2022-03-20 17:50:46,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599106804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:46,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398394196] [2022-03-20 17:50:46,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:46,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:46,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:46,686 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 17:50:46,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 17:50:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 17:50:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:47,285 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:50:47,285 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 [2022-03-20 17:50:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:50:47,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:47,506 INFO L356 Elim1Store]: treesize reduction 35, result has 63.9 percent of original size [2022-03-20 17:50:47,506 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 69 [2022-03-20 17:50:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:50:47,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398394196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:47,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:47,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 38 [2022-03-20 17:50:47,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1071466423] [2022-03-20 17:50:47,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1071466423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:47,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:47,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:50:47,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619223017] [2022-03-20 17:50:47,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:47,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:50:47,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:47,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:50:47,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:50:47,670 INFO L87 Difference]: Start difference. First operand 569 states and 659 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:49,494 INFO L93 Difference]: Finished difference Result 1224 states and 1411 transitions. [2022-03-20 17:50:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:50:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 72 [2022-03-20 17:50:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:49,497 INFO L225 Difference]: With dead ends: 1224 [2022-03-20 17:50:49,497 INFO L226 Difference]: Without dead ends: 1161 [2022-03-20 17:50:49,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 17:50:49,498 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 173 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:49,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 91 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:50:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-03-20 17:50:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 726. [2022-03-20 17:50:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 721 states have (on average 1.159500693481276) internal successors, (836), 721 states have internal predecessors, (836), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 840 transitions. [2022-03-20 17:50:50,040 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 840 transitions. Word has length 72 [2022-03-20 17:50:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:50,040 INFO L478 AbstractCegarLoop]: Abstraction has 726 states and 840 transitions. [2022-03-20 17:50:50,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 840 transitions. [2022-03-20 17:50:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:50:50,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:50,042 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:50,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:50,262 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:50,262 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 25 times [2022-03-20 17:50:50,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:50,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575208843] [2022-03-20 17:50:50,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:50,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 26 times [2022-03-20 17:50:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:50,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937350931] [2022-03-20 17:50:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:50,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 17:50:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937350931] [2022-03-20 17:50:50,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937350931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578845085] [2022-03-20 17:50:50,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:50,812 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:50,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 17:50:50,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 17:50:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:51,287 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:50:51,287 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 [2022-03-20 17:50:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 17:50:51,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:51,462 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-03-20 17:50:51,462 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 34 treesize of output 75 [2022-03-20 17:50:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 17:50:51,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578845085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:51,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:51,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 27 [2022-03-20 17:50:51,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575208843] [2022-03-20 17:50:51,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575208843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:51,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:51,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:50:51,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928858762] [2022-03-20 17:50:51,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:51,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:50:51,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:50:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:50:51,606 INFO L87 Difference]: Start difference. First operand 726 states and 840 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:52,661 INFO L93 Difference]: Finished difference Result 952 states and 1094 transitions. [2022-03-20 17:50:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:50:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 72 [2022-03-20 17:50:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:52,664 INFO L225 Difference]: With dead ends: 952 [2022-03-20 17:50:52,664 INFO L226 Difference]: Without dead ends: 908 [2022-03-20 17:50:52,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:50:52,665 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:52,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 54 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:50:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-03-20 17:50:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 760. [2022-03-20 17:50:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 755 states have (on average 1.1523178807947019) internal successors, (870), 755 states have internal predecessors, (870), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 874 transitions. [2022-03-20 17:50:53,235 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 874 transitions. Word has length 72 [2022-03-20 17:50:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:53,235 INFO L478 AbstractCegarLoop]: Abstraction has 760 states and 874 transitions. [2022-03-20 17:50:53,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 874 transitions. [2022-03-20 17:50:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:50:53,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:53,237 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:53,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:53,459 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 [2022-03-20 17:50:53,460 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 27 times [2022-03-20 17:50:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:53,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289649423] [2022-03-20 17:50:53,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:53,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 28 times [2022-03-20 17:50:53,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:53,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477790998] [2022-03-20 17:50:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:53,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 17:50:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477790998] [2022-03-20 17:50:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477790998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818237170] [2022-03-20 17:50:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:54,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:54,196 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:54,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 17:50:54,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:54,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 17:50:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:54,810 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 17:50:54,810 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 [2022-03-20 17:50:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 17:50:54,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:55,061 INFO L356 Elim1Store]: treesize reduction 27, result has 72.2 percent of original size [2022-03-20 17:50:55,061 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 77 [2022-03-20 17:50:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:50:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818237170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:55,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 40 [2022-03-20 17:50:55,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289649423] [2022-03-20 17:50:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289649423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:55,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:50:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798863607] [2022-03-20 17:50:55,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:55,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:50:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:50:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:50:55,230 INFO L87 Difference]: Start difference. First operand 760 states and 874 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:57,292 INFO L93 Difference]: Finished difference Result 1436 states and 1645 transitions. [2022-03-20 17:50:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:50:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 72 [2022-03-20 17:50:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:57,296 INFO L225 Difference]: With dead ends: 1436 [2022-03-20 17:50:57,296 INFO L226 Difference]: Without dead ends: 1236 [2022-03-20 17:50:57,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=462, Invalid=2730, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 17:50:57,297 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 254 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:57,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 81 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:50:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-03-20 17:50:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 948. [2022-03-20 17:50:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 943 states have (on average 1.1431601272534464) internal successors, (1078), 943 states have internal predecessors, (1078), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1082 transitions. [2022-03-20 17:50:58,117 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1082 transitions. Word has length 72 [2022-03-20 17:50:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:58,117 INFO L478 AbstractCegarLoop]: Abstraction has 948 states and 1082 transitions. [2022-03-20 17:50:58,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:50:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1082 transitions. [2022-03-20 17:50:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 17:50:58,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:58,119 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:50:58,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:58,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 17:50:58,319 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 29 times [2022-03-20 17:50:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:58,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529597209] [2022-03-20 17:50:58,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:58,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 30 times [2022-03-20 17:50:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697113931] [2022-03-20 17:50:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:58,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:50:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697113931] [2022-03-20 17:50:58,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697113931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821990211] [2022-03-20 17:50:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:58,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:58,483 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:58,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 17:50:58,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:50:58,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:58,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 17:50:58,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:59,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:50:59,263 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:50:59,264 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 17 treesize of output 10 [2022-03-20 17:50:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-03-20 17:50:59,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:59,659 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 17:50:59,659 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 1 [2022-03-20 17:50:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-03-20 17:50:59,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821990211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:59,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:59,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-03-20 17:50:59,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:59,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529597209] [2022-03-20 17:50:59,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529597209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:59,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:59,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:50:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949406342] [2022-03-20 17:50:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:59,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:50:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:50:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:50:59,695 INFO L87 Difference]: Start difference. First operand 948 states and 1082 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) [2022-03-20 17:51:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:03,186 INFO L93 Difference]: Finished difference Result 3393 states and 3886 transitions. [2022-03-20 17:51:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:51:03,186 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 73 [2022-03-20 17:51:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:03,193 INFO L225 Difference]: With dead ends: 3393 [2022-03-20 17:51:03,193 INFO L226 Difference]: Without dead ends: 3344 [2022-03-20 17:51:03,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:51:03,195 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 309 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:03,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 170 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:51:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-03-20 17:51:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 950. [2022-03-20 17:51:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 945 states have (on average 1.143915343915344) internal successors, (1081), 945 states have internal predecessors, (1081), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1085 transitions. [2022-03-20 17:51:04,020 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1085 transitions. Word has length 73 [2022-03-20 17:51:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:04,020 INFO L478 AbstractCegarLoop]: Abstraction has 950 states and 1085 transitions. [2022-03-20 17:51:04,020 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) [2022-03-20 17:51:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1085 transitions. [2022-03-20 17:51:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 17:51:04,022 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:04,022 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:04,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:04,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 17:51:04,222 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:04,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1623991599, now seen corresponding path program 31 times [2022-03-20 17:51:04,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:04,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1441122603] [2022-03-20 17:51:04,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:04,224 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1623991599, now seen corresponding path program 32 times [2022-03-20 17:51:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:04,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670113778] [2022-03-20 17:51:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:04,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:04,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 17:51:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:04,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670113778] [2022-03-20 17:51:04,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670113778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:04,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119226148] [2022-03-20 17:51:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:51:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:04,340 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:04,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 17:51:04,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:51:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:04,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:51:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:04,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:51:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-20 17:51:04,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:05,001 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:51:05,001 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 [2022-03-20 17:51:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 17:51:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119226148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:05,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:05,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2022-03-20 17:51:05,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1441122603] [2022-03-20 17:51:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1441122603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:05,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:05,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:51:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035658353] [2022-03-20 17:51:05,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:05,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:51:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:51:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:51:05,076 INFO L87 Difference]: Start difference. First operand 950 states and 1085 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:07,070 INFO L93 Difference]: Finished difference Result 1934 states and 2199 transitions. [2022-03-20 17:51:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:51:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 74 [2022-03-20 17:51:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:07,074 INFO L225 Difference]: With dead ends: 1934 [2022-03-20 17:51:07,074 INFO L226 Difference]: Without dead ends: 1809 [2022-03-20 17:51:07,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:51:07,075 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 258 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:07,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 81 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:51:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-03-20 17:51:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1032. [2022-03-20 17:51:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.1402142161635833) internal successors, (1171), 1027 states have internal predecessors, (1171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1175 transitions. [2022-03-20 17:51:07,971 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1175 transitions. Word has length 74 [2022-03-20 17:51:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:07,972 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1175 transitions. [2022-03-20 17:51:07,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1175 transitions. [2022-03-20 17:51:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 17:51:07,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:07,974 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:51:07,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:08,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:08,177 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 33 times [2022-03-20 17:51:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:08,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677383695] [2022-03-20 17:51:08,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:08,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 34 times [2022-03-20 17:51:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:08,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41658005] [2022-03-20 17:51:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:51:08,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:08,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41658005] [2022-03-20 17:51:08,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41658005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:08,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930787684] [2022-03-20 17:51:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:51:08,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:08,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:08,380 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:08,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 17:51:08,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:51:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:51:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:08,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:51:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 17:51:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:09,121 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:51:09,121 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 [2022-03-20 17:51:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 17:51:09,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930787684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:09,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:09,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2022-03-20 17:51:09,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:09,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677383695] [2022-03-20 17:51:09,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677383695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:09,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:09,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:51:09,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882703646] [2022-03-20 17:51:09,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:09,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:51:09,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:51:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:51:09,224 INFO L87 Difference]: Start difference. First operand 1032 states and 1175 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:13,569 INFO L93 Difference]: Finished difference Result 3883 states and 4447 transitions. [2022-03-20 17:51:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:51:13,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-20 17:51:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:13,578 INFO L225 Difference]: With dead ends: 3883 [2022-03-20 17:51:13,578 INFO L226 Difference]: Without dead ends: 3834 [2022-03-20 17:51:13,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:51:13,579 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:13,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 194 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:51:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-03-20 17:51:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 1034. [2022-03-20 17:51:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1029 states have (on average 1.1409135082604471) internal successors, (1174), 1029 states have internal predecessors, (1174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1178 transitions. [2022-03-20 17:51:14,462 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1178 transitions. Word has length 75 [2022-03-20 17:51:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:14,462 INFO L478 AbstractCegarLoop]: Abstraction has 1034 states and 1178 transitions. [2022-03-20 17:51:14,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1178 transitions. [2022-03-20 17:51:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 17:51:14,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:14,464 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:14,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:14,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 17:51:14,679 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1908734380, now seen corresponding path program 35 times [2022-03-20 17:51:14,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:14,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274554296] [2022-03-20 17:51:14,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:14,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1908734380, now seen corresponding path program 36 times [2022-03-20 17:51:14,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:14,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598680639] [2022-03-20 17:51:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:14,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:14,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 17:51:14,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:14,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598680639] [2022-03-20 17:51:14,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598680639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773134542] [2022-03-20 17:51:14,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:51:14,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:14,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:14,828 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:14,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 17:51:14,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 17:51:14,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 17:51:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:15,038 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 15 treesize of output 11 [2022-03-20 17:51:15,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:51:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 17:51:15,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 17:51:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773134542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:15,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:15,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2022-03-20 17:51:15,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:15,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274554296] [2022-03-20 17:51:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274554296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:15,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:15,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:51:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785525708] [2022-03-20 17:51:15,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:15,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:51:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:51:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-03-20 17:51:15,638 INFO L87 Difference]: Start difference. First operand 1034 states and 1178 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2022-03-20 17:51:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:18,242 INFO L93 Difference]: Finished difference Result 2385 states and 2721 transitions. [2022-03-20 17:51:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:51:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 76 [2022-03-20 17:51:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:18,248 INFO L225 Difference]: With dead ends: 2385 [2022-03-20 17:51:18,248 INFO L226 Difference]: Without dead ends: 2260 [2022-03-20 17:51:18,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:51:18,249 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 260 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:18,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 104 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:51:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-03-20 17:51:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1034. [2022-03-20 17:51:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1029 states have (on average 1.1409135082604471) internal successors, (1174), 1029 states have internal predecessors, (1174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1178 transitions. [2022-03-20 17:51:19,141 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1178 transitions. Word has length 76 [2022-03-20 17:51:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:19,141 INFO L478 AbstractCegarLoop]: Abstraction has 1034 states and 1178 transitions. [2022-03-20 17:51:19,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2022-03-20 17:51:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1178 transitions. [2022-03-20 17:51:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 17:51:19,142 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:19,142 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:51:19,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:19,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 17:51:19,343 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 37 times [2022-03-20 17:51:19,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:19,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1325874048] [2022-03-20 17:51:19,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:19,344 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 38 times [2022-03-20 17:51:19,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458484346] [2022-03-20 17:51:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:19,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:19,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:51:19,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:19,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458484346] [2022-03-20 17:51:19,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458484346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:19,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304275631] [2022-03-20 17:51:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:51:19,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:19,573 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:19,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 17:51:19,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:51:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:51:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:20,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:51:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-03-20 17:51:20,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:20,292 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:51:20,293 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 [2022-03-20 17:51:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 65 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-20 17:51:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304275631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:20,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-03-20 17:51:20,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1325874048] [2022-03-20 17:51:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1325874048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:20,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:51:20,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780390340] [2022-03-20 17:51:20,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:20,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:51:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:51:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:51:20,379 INFO L87 Difference]: Start difference. First operand 1034 states and 1178 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:25,632 INFO L93 Difference]: Finished difference Result 4373 states and 5008 transitions. [2022-03-20 17:51:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:51:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 17:51:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:25,641 INFO L225 Difference]: With dead ends: 4373 [2022-03-20 17:51:25,642 INFO L226 Difference]: Without dead ends: 4324 [2022-03-20 17:51:25,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=2088, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 17:51:25,643 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 376 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:25,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 213 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:51:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-03-20 17:51:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 1036. [2022-03-20 17:51:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1031 states have (on average 1.1416100872938895) internal successors, (1177), 1031 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1181 transitions. [2022-03-20 17:51:26,591 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1181 transitions. Word has length 77 [2022-03-20 17:51:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:26,591 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1181 transitions. [2022-03-20 17:51:26,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1181 transitions. [2022-03-20 17:51:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 17:51:26,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:26,593 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:26,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:26,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:26,794 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash -460730937, now seen corresponding path program 39 times [2022-03-20 17:51:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:26,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624400966] [2022-03-20 17:51:26,795 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:26,795 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash -460730937, now seen corresponding path program 40 times [2022-03-20 17:51:26,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:26,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942819] [2022-03-20 17:51:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:26,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:26,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 17:51:26,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942819] [2022-03-20 17:51:26,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988030706] [2022-03-20 17:51:26,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:51:26,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:26,952 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:26,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 17:51:27,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:51:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:51:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:27,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:51:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 17:51:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:27,659 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:51:27,659 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 [2022-03-20 17:51:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 17:51:27,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988030706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:27,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:27,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2022-03-20 17:51:27,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:27,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624400966] [2022-03-20 17:51:27,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624400966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:27,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:27,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:51:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459665636] [2022-03-20 17:51:27,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:27,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:51:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:51:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 17:51:27,744 INFO L87 Difference]: Start difference. First operand 1036 states and 1181 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:31,115 INFO L93 Difference]: Finished difference Result 2875 states and 3282 transitions. [2022-03-20 17:51:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:51:31,116 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 78 [2022-03-20 17:51:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:31,120 INFO L225 Difference]: With dead ends: 2875 [2022-03-20 17:51:31,120 INFO L226 Difference]: Without dead ends: 2750 [2022-03-20 17:51:31,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 17:51:31,121 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 318 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:31,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 123 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:51:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2022-03-20 17:51:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1036. [2022-03-20 17:51:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1031 states have (on average 1.1416100872938895) internal successors, (1177), 1031 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1181 transitions. [2022-03-20 17:51:32,088 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1181 transitions. Word has length 78 [2022-03-20 17:51:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:32,088 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1181 transitions. [2022-03-20 17:51:32,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1181 transitions. [2022-03-20 17:51:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 17:51:32,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:32,090 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:51:32,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:32,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 17:51:32,290 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 41 times [2022-03-20 17:51:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:32,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381675661] [2022-03-20 17:51:32,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:32,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 42 times [2022-03-20 17:51:32,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:32,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564083874] [2022-03-20 17:51:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:32,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:32,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:51:32,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:32,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564083874] [2022-03-20 17:51:32,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564083874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:32,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413984759] [2022-03-20 17:51:32,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:51:32,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:32,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:32,531 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 17:51:32,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:51:32,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:32,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:51:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 17:51:33,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:33,683 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 17:51:33,683 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 1 [2022-03-20 17:51:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 17:51:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413984759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:33,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:33,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 35 [2022-03-20 17:51:33,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381675661] [2022-03-20 17:51:33,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381675661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:33,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:33,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:51:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327850892] [2022-03-20 17:51:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:33,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:51:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:51:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:51:33,734 INFO L87 Difference]: Start difference. First operand 1036 states and 1181 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:40,108 INFO L93 Difference]: Finished difference Result 4863 states and 5569 transitions. [2022-03-20 17:51:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:51:40,108 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 79 [2022-03-20 17:51:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:40,116 INFO L225 Difference]: With dead ends: 4863 [2022-03-20 17:51:40,116 INFO L226 Difference]: Without dead ends: 4814 [2022-03-20 17:51:40,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=2087, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 17:51:40,117 INFO L913 BasicCegarLoop]: 175 mSDtfsCounter, 407 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:40,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:51:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2022-03-20 17:51:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 1038. [2022-03-20 17:51:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1033 states have (on average 1.1423039690222652) internal successors, (1180), 1033 states have internal predecessors, (1180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1184 transitions. [2022-03-20 17:51:41,167 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1184 transitions. Word has length 79 [2022-03-20 17:51:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:41,167 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1184 transitions. [2022-03-20 17:51:41,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1184 transitions. [2022-03-20 17:51:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 17:51:41,169 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:41,169 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:41,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:41,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:41,370 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1184233694, now seen corresponding path program 43 times [2022-03-20 17:51:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:41,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214238909] [2022-03-20 17:51:41,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:41,372 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1184233694, now seen corresponding path program 44 times [2022-03-20 17:51:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480397366] [2022-03-20 17:51:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:41,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 17:51:41,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480397366] [2022-03-20 17:51:41,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480397366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890156309] [2022-03-20 17:51:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:51:41,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:41,538 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:41,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 17:51:41,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:51:41,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:41,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:51:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:42,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:51:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-03-20 17:51:42,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:42,288 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:51:42,288 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 [2022-03-20 17:51:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-20 17:51:42,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890156309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:42,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:42,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2022-03-20 17:51:42,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214238909] [2022-03-20 17:51:42,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214238909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:42,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:42,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:51:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416693845] [2022-03-20 17:51:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:42,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:51:42,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:51:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:51:42,368 INFO L87 Difference]: Start difference. First operand 1038 states and 1184 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:46,928 INFO L93 Difference]: Finished difference Result 3398 states and 3880 transitions. [2022-03-20 17:51:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:51:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 17:51:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:46,933 INFO L225 Difference]: With dead ends: 3398 [2022-03-20 17:51:46,933 INFO L226 Difference]: Without dead ends: 3273 [2022-03-20 17:51:46,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1976, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:51:46,934 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 358 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:46,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 151 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:51:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-03-20 17:51:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 1038. [2022-03-20 17:51:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1033 states have (on average 1.1423039690222652) internal successors, (1180), 1033 states have internal predecessors, (1180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1184 transitions. [2022-03-20 17:51:48,018 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1184 transitions. Word has length 80 [2022-03-20 17:51:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:48,018 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1184 transitions. [2022-03-20 17:51:48,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1184 transitions. [2022-03-20 17:51:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 17:51:48,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:48,020 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:48,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:48,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:48,220 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 45 times [2022-03-20 17:51:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:48,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223546841] [2022-03-20 17:51:48,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:48,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 46 times [2022-03-20 17:51:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:48,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917013959] [2022-03-20 17:51:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:51:48,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:48,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917013959] [2022-03-20 17:51:48,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917013959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:48,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132841251] [2022-03-20 17:51:48,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:51:48,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:48,348 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:48,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 17:51:48,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:51:48,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 17:51:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:49,316 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:51:49,317 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 [2022-03-20 17:51:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 17:51:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:52,133 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 17:51:52,134 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 48 treesize of output 37 [2022-03-20 17:51:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 17:51:52,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132841251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:52,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:52,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 18] total 44 [2022-03-20 17:51:52,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223546841] [2022-03-20 17:51:52,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223546841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:52,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:52,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:51:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671356553] [2022-03-20 17:51:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:52,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:51:52,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:52,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:51:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1686, Unknown=4, NotChecked=0, Total=1892 [2022-03-20 17:51:52,189 INFO L87 Difference]: Start difference. First operand 1038 states and 1184 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:53,405 INFO L93 Difference]: Finished difference Result 1303 states and 1472 transitions. [2022-03-20 17:51:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:51:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 17:51:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:53,407 INFO L225 Difference]: With dead ends: 1303 [2022-03-20 17:51:53,407 INFO L226 Difference]: Without dead ends: 823 [2022-03-20 17:51:53,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=237, Invalid=2209, Unknown=4, NotChecked=0, Total=2450 [2022-03-20 17:51:53,408 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:53,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 81 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:51:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-03-20 17:51:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 738. [2022-03-20 17:51:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 733 states have (on average 1.13506139154161) internal successors, (832), 733 states have internal predecessors, (832), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 836 transitions. [2022-03-20 17:51:54,194 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 836 transitions. Word has length 81 [2022-03-20 17:51:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:54,194 INFO L478 AbstractCegarLoop]: Abstraction has 738 states and 836 transitions. [2022-03-20 17:51:54,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:51:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 836 transitions. [2022-03-20 17:51:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 17:51:54,195 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:54,195 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:51:54,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:54,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 17:51:54,396 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 47 times [2022-03-20 17:51:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866145747] [2022-03-20 17:51:54,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:54,397 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 48 times [2022-03-20 17:51:54,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:54,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853322909] [2022-03-20 17:51:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:54,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:51:54,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853322909] [2022-03-20 17:51:54,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853322909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611995892] [2022-03-20 17:51:54,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:51:54,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:54,638 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:54,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 17:51:54,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:51:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 17:51:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:55,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:51:55,420 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:51:55,421 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 17 treesize of output 10 [2022-03-20 17:51:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-20 17:51:55,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:55,812 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 17:51:55,813 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 1 [2022-03-20 17:51:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-20 17:51:55,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611995892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:55,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:55,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 13] total 37 [2022-03-20 17:51:55,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866145747] [2022-03-20 17:51:55,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866145747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:55,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:55,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:51:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881666794] [2022-03-20 17:51:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:55,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:51:55,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:51:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:51:55,849 INFO L87 Difference]: Start difference. First operand 738 states and 836 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) [2022-03-20 17:52:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:03,090 INFO L93 Difference]: Finished difference Result 4987 states and 5710 transitions. [2022-03-20 17:52:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:52:03,090 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 81 [2022-03-20 17:52:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:03,098 INFO L225 Difference]: With dead ends: 4987 [2022-03-20 17:52:03,098 INFO L226 Difference]: Without dead ends: 4938 [2022-03-20 17:52:03,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 17:52:03,100 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 448 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:03,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 261 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 17:52:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-03-20 17:52:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 740. [2022-03-20 17:52:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 735 states have (on average 1.1360544217687074) internal successors, (835), 735 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 839 transitions. [2022-03-20 17:52:04,015 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 839 transitions. Word has length 81 [2022-03-20 17:52:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:04,015 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 839 transitions. [2022-03-20 17:52:04,015 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) [2022-03-20 17:52:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 839 transitions. [2022-03-20 17:52:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 17:52:04,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:04,016 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:04,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:04,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 17:52:04,217 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:04,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 49 times [2022-03-20 17:52:04,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:04,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801386287] [2022-03-20 17:52:04,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:04,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 50 times [2022-03-20 17:52:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:04,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833634352] [2022-03-20 17:52:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:04,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-20 17:52:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:04,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833634352] [2022-03-20 17:52:04,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833634352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:04,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804715222] [2022-03-20 17:52:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:52:04,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:04,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:04,608 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:04,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 17:52:04,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:52:04,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:04,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:52:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:05,665 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:52:05,665 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 41 treesize of output 17 [2022-03-20 17:52:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 35 proven. 77 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 17:52:05,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:07,272 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 17:52:07,273 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 46 treesize of output 37 [2022-03-20 17:52:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 17:52:07,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804715222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:07,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:07,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 18] total 52 [2022-03-20 17:52:07,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:07,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801386287] [2022-03-20 17:52:07,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801386287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:07,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:07,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:52:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545348807] [2022-03-20 17:52:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:07,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:52:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:52:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2334, Unknown=2, NotChecked=0, Total=2652 [2022-03-20 17:52:07,390 INFO L87 Difference]: Start difference. First operand 740 states and 839 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:08,780 INFO L93 Difference]: Finished difference Result 815 states and 918 transitions. [2022-03-20 17:52:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:52:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 82 [2022-03-20 17:52:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:08,781 INFO L225 Difference]: With dead ends: 815 [2022-03-20 17:52:08,781 INFO L226 Difference]: Without dead ends: 610 [2022-03-20 17:52:08,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=427, Invalid=3353, Unknown=2, NotChecked=0, Total=3782 [2022-03-20 17:52:08,782 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:08,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 71 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:52:08,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-20 17:52:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-03-20 17:52:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.1504132231404958) internal successors, (696), 605 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 700 transitions. [2022-03-20 17:52:09,485 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 700 transitions. Word has length 82 [2022-03-20 17:52:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:09,485 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 700 transitions. [2022-03-20 17:52:09,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 700 transitions. [2022-03-20 17:52:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 17:52:09,486 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:09,486 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:09,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:09,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 17:52:09,691 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -685681219, now seen corresponding path program 51 times [2022-03-20 17:52:09,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:09,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [548489291] [2022-03-20 17:52:09,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:09,692 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -685681219, now seen corresponding path program 52 times [2022-03-20 17:52:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:09,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31867896] [2022-03-20 17:52:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:09,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:09,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 17:52:09,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:09,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31867896] [2022-03-20 17:52:09,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31867896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:09,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953980508] [2022-03-20 17:52:09,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:52:09,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:09,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:09,896 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) [2022-03-20 17:52:09,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 17:52:10,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:52:10,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:52:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:10,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:52:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 17:52:10,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:10,627 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:52:10,627 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 [2022-03-20 17:52:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-20 17:52:10,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953980508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:10,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:10,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-03-20 17:52:10,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [548489291] [2022-03-20 17:52:10,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [548489291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:10,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:10,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:52:10,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209518178] [2022-03-20 17:52:10,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:10,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:52:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:52:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:52:10,712 INFO L87 Difference]: Start difference. First operand 610 states and 700 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:15,654 INFO L93 Difference]: Finished difference Result 3326 states and 3811 transitions. [2022-03-20 17:52:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:52:15,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 17:52:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:15,660 INFO L225 Difference]: With dead ends: 3326 [2022-03-20 17:52:15,660 INFO L226 Difference]: Without dead ends: 3201 [2022-03-20 17:52:15,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 17:52:15,662 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 373 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:15,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 151 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:52:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2022-03-20 17:52:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 610. [2022-03-20 17:52:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.1504132231404958) internal successors, (696), 605 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 700 transitions. [2022-03-20 17:52:16,524 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 700 transitions. Word has length 82 [2022-03-20 17:52:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:16,524 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 700 transitions. [2022-03-20 17:52:16,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 700 transitions. [2022-03-20 17:52:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:52:16,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:16,525 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:16,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:16,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:16,725 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 53 times [2022-03-20 17:52:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958689890] [2022-03-20 17:52:16,726 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:16,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 54 times [2022-03-20 17:52:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:16,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200194910] [2022-03-20 17:52:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:17,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:52:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:17,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200194910] [2022-03-20 17:52:17,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200194910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:17,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083936508] [2022-03-20 17:52:17,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:52:17,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:17,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:17,794 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:17,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 17:52:17,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 17:52:17,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:17,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:52:17,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:52:18,402 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:52:18,403 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 18 treesize of output 11 [2022-03-20 17:52:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:18,594 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:52:18,594 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 [2022-03-20 17:52:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:18,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083936508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:18,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:18,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12, 11] total 43 [2022-03-20 17:52:18,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:18,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958689890] [2022-03-20 17:52:18,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958689890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:18,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:18,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 17:52:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551710204] [2022-03-20 17:52:18,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:18,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 17:52:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 17:52:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:52:18,675 INFO L87 Difference]: Start difference. First operand 610 states and 700 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:22,731 INFO L93 Difference]: Finished difference Result 2033 states and 2337 transitions. [2022-03-20 17:52:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 17:52:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 17:52:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:22,734 INFO L225 Difference]: With dead ends: 2033 [2022-03-20 17:52:22,734 INFO L226 Difference]: Without dead ends: 1745 [2022-03-20 17:52:22,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=590, Invalid=4102, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 17:52:22,735 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 279 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:22,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 125 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:52:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-03-20 17:52:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 865. [2022-03-20 17:52:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 860 states have (on average 1.1406976744186046) internal successors, (981), 860 states have internal predecessors, (981), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 985 transitions. [2022-03-20 17:52:23,866 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 985 transitions. Word has length 83 [2022-03-20 17:52:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:23,866 INFO L478 AbstractCegarLoop]: Abstraction has 865 states and 985 transitions. [2022-03-20 17:52:23,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 985 transitions. [2022-03-20 17:52:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:52:23,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:23,867 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:23,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 17:52:24,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 17:52:24,068 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 55 times [2022-03-20 17:52:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200398052] [2022-03-20 17:52:24,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:24,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 56 times [2022-03-20 17:52:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:24,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843327787] [2022-03-20 17:52:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:25,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:52:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843327787] [2022-03-20 17:52:25,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843327787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872842146] [2022-03-20 17:52:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:52:25,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:25,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:25,289 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:25,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 17:52:25,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:52:25,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:52:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:25,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:52:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 17:52:25,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:26,106 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:52:26,107 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 [2022-03-20 17:52:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:26,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872842146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:26,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:26,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 11] total 44 [2022-03-20 17:52:26,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:26,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200398052] [2022-03-20 17:52:26,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200398052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:26,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:26,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:52:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6204174] [2022-03-20 17:52:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:26,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:52:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:52:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 17:52:26,202 INFO L87 Difference]: Start difference. First operand 865 states and 985 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:30,598 INFO L93 Difference]: Finished difference Result 2136 states and 2454 transitions. [2022-03-20 17:52:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:52:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 17:52:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:30,602 INFO L225 Difference]: With dead ends: 2136 [2022-03-20 17:52:30,602 INFO L226 Difference]: Without dead ends: 1827 [2022-03-20 17:52:30,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=514, Invalid=3518, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 17:52:30,603 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 279 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:30,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 115 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:52:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-03-20 17:52:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1051. [2022-03-20 17:52:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1046 states have (on average 1.135755258126195) internal successors, (1188), 1046 states have internal predecessors, (1188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1192 transitions. [2022-03-20 17:52:32,023 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1192 transitions. Word has length 83 [2022-03-20 17:52:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:32,023 INFO L478 AbstractCegarLoop]: Abstraction has 1051 states and 1192 transitions. [2022-03-20 17:52:32,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1192 transitions. [2022-03-20 17:52:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:52:32,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:32,024 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:32,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:32,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 17:52:32,225 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:32,225 INFO L85 PathProgramCache]: Analyzing trace with hash -735580963, now seen corresponding path program 57 times [2022-03-20 17:52:32,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:32,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459243094] [2022-03-20 17:52:32,226 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:32,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -735580963, now seen corresponding path program 58 times [2022-03-20 17:52:32,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:32,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350243125] [2022-03-20 17:52:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:32,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:32,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 13 proven. 80 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 17:52:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350243125] [2022-03-20 17:52:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350243125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554042661] [2022-03-20 17:52:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:52:32,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:32,761 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 17:52:32,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:52:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:52:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:33,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:52:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 17:52:33,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:33,464 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:52:33,465 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 [2022-03-20 17:52:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:33,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554042661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:33,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:33,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 11] total 36 [2022-03-20 17:52:33,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459243094] [2022-03-20 17:52:33,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459243094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:33,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:33,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:52:33,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858172923] [2022-03-20 17:52:33,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:33,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:52:33,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:33,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:52:33,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:52:33,540 INFO L87 Difference]: Start difference. First operand 1051 states and 1192 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:36,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:36,144 INFO L93 Difference]: Finished difference Result 1523 states and 1724 transitions. [2022-03-20 17:52:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:52:36,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 83 [2022-03-20 17:52:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:36,146 INFO L225 Difference]: With dead ends: 1523 [2022-03-20 17:52:36,146 INFO L226 Difference]: Without dead ends: 1459 [2022-03-20 17:52:36,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 17:52:36,147 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 149 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:36,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 82 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:52:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-03-20 17:52:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1322. [2022-03-20 17:52:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1317 states have (on average 1.132118451025057) internal successors, (1491), 1317 states have internal predecessors, (1491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1495 transitions. [2022-03-20 17:52:37,971 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1495 transitions. Word has length 83 [2022-03-20 17:52:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:37,971 INFO L478 AbstractCegarLoop]: Abstraction has 1322 states and 1495 transitions. [2022-03-20 17:52:37,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:37,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1495 transitions. [2022-03-20 17:52:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:52:37,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:37,974 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:37,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:38,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:38,183 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 81092769, now seen corresponding path program 59 times [2022-03-20 17:52:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:38,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684005292] [2022-03-20 17:52:38,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:38,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash 81092769, now seen corresponding path program 60 times [2022-03-20 17:52:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:38,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612468511] [2022-03-20 17:52:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 13 proven. 80 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 17:52:38,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:38,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612468511] [2022-03-20 17:52:38,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612468511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:38,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905571285] [2022-03-20 17:52:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:52:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:38,780 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:38,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 17:52:38,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 17:52:38,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:52:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:39,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:52:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:39,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:39,526 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:52:39,526 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 [2022-03-20 17:52:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:39,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905571285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:39,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:39,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 34 [2022-03-20 17:52:39,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684005292] [2022-03-20 17:52:39,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684005292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:39,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:39,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:52:39,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712368715] [2022-03-20 17:52:39,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:39,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:52:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:52:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:52:39,599 INFO L87 Difference]: Start difference. First operand 1322 states and 1495 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:42,151 INFO L93 Difference]: Finished difference Result 1516 states and 1710 transitions. [2022-03-20 17:52:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:52:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 83 [2022-03-20 17:52:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:42,154 INFO L225 Difference]: With dead ends: 1516 [2022-03-20 17:52:42,154 INFO L226 Difference]: Without dead ends: 1465 [2022-03-20 17:52:42,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:52:42,155 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:42,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 60 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:52:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-03-20 17:52:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1315. [2022-03-20 17:52:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1310 states have (on average 1.130534351145038) internal successors, (1481), 1310 states have internal predecessors, (1481), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1485 transitions. [2022-03-20 17:52:43,948 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1485 transitions. Word has length 83 [2022-03-20 17:52:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:43,949 INFO L478 AbstractCegarLoop]: Abstraction has 1315 states and 1485 transitions. [2022-03-20 17:52:43,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1485 transitions. [2022-03-20 17:52:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:52:43,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:43,951 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:43,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:44,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 17:52:44,167 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1189511131, now seen corresponding path program 61 times [2022-03-20 17:52:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153935445] [2022-03-20 17:52:44,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:44,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:44,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1189511131, now seen corresponding path program 62 times [2022-03-20 17:52:44,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:44,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766436193] [2022-03-20 17:52:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:45,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 17:52:45,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766436193] [2022-03-20 17:52:45,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766436193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598345638] [2022-03-20 17:52:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:52:45,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:45,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:45,394 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:45,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 17:52:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:52:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:52:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:46,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:52:46,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:52:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:52:46,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:52:46,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:52:46,207 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:52:46,207 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 53 treesize of output 20 [2022-03-20 17:52:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 17:52:46,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:46,667 INFO L356 Elim1Store]: treesize reduction 58, result has 60.5 percent of original size [2022-03-20 17:52:46,668 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 54 treesize of output 104 [2022-03-20 17:52:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 17:52:46,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598345638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:46,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:46,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 16] total 48 [2022-03-20 17:52:46,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:46,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153935445] [2022-03-20 17:52:46,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153935445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:46,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:46,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 17:52:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140244376] [2022-03-20 17:52:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:46,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 17:52:46,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 17:52:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 17:52:46,875 INFO L87 Difference]: Start difference. First operand 1315 states and 1485 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:52,139 INFO L93 Difference]: Finished difference Result 2426 states and 2726 transitions. [2022-03-20 17:52:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 17:52:52,139 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have 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 [2022-03-20 17:52:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:52,142 INFO L225 Difference]: With dead ends: 2426 [2022-03-20 17:52:52,142 INFO L226 Difference]: Without dead ends: 2421 [2022-03-20 17:52:52,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=659, Invalid=4597, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 17:52:52,143 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 344 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:52,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 85 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:52:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-03-20 17:52:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1315. [2022-03-20 17:52:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1310 states have (on average 1.130534351145038) internal successors, (1481), 1310 states have internal predecessors, (1481), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1485 transitions. [2022-03-20 17:52:53,987 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1485 transitions. Word has length 83 [2022-03-20 17:52:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:53,988 INFO L478 AbstractCegarLoop]: Abstraction has 1315 states and 1485 transitions. [2022-03-20 17:52:53,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:52:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1485 transitions. [2022-03-20 17:52:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:52:53,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:53,990 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:54,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 17:52:54,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:54,190 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:54,191 INFO L85 PathProgramCache]: Analyzing trace with hash 438642597, now seen corresponding path program 63 times [2022-03-20 17:52:54,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:54,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195808423] [2022-03-20 17:52:54,191 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:54,192 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash 438642597, now seen corresponding path program 64 times [2022-03-20 17:52:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:54,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928931271] [2022-03-20 17:52:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:55,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 17:52:55,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928931271] [2022-03-20 17:52:55,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928931271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831711886] [2022-03-20 17:52:55,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:52:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:55,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:55,730 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:55,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 17:52:55,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:52:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:52:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:56,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:52:56,342 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:52:56,342 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 18 treesize of output 11 [2022-03-20 17:52:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-20 17:52:56,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:56,565 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:52:56,565 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 [2022-03-20 17:52:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 17:52:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831711886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:56,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 11] total 47 [2022-03-20 17:52:56,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195808423] [2022-03-20 17:52:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195808423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:56,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 17:52:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995242050] [2022-03-20 17:52:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:56,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 17:52:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 17:52:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:52:56,661 INFO L87 Difference]: Start difference. First operand 1315 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:04,003 INFO L93 Difference]: Finished difference Result 3683 states and 4148 transitions. [2022-03-20 17:53:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 17:53:04,004 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 17:53:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:04,008 INFO L225 Difference]: With dead ends: 3683 [2022-03-20 17:53:04,008 INFO L226 Difference]: Without dead ends: 3678 [2022-03-20 17:53:04,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=562, Invalid=4408, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 17:53:04,009 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 285 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:04,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 123 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:53:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2022-03-20 17:53:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1442. [2022-03-20 17:53:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1437 states have (on average 1.1329157967988865) internal successors, (1628), 1437 states have internal predecessors, (1628), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1632 transitions. [2022-03-20 17:53:06,079 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1632 transitions. Word has length 83 [2022-03-20 17:53:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:06,079 INFO L478 AbstractCegarLoop]: Abstraction has 1442 states and 1632 transitions. [2022-03-20 17:53:06,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1632 transitions. [2022-03-20 17:53:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 17:53:06,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:06,082 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:53:06,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 17:53:06,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-20 17:53:06,295 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash -393734198, now seen corresponding path program 65 times [2022-03-20 17:53:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738048694] [2022-03-20 17:53:06,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:06,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:06,297 INFO L85 PathProgramCache]: Analyzing trace with hash -393734198, now seen corresponding path program 66 times [2022-03-20 17:53:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791962284] [2022-03-20 17:53:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:06,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:53:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791962284] [2022-03-20 17:53:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791962284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124737350] [2022-03-20 17:53:06,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:53:06,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:06,530 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:06,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 17:53:06,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:53:06,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 17:53:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:53:07,283 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:53:07,283 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 17 treesize of output 10 [2022-03-20 17:53:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 17:53:07,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:07,632 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 17:53:07,632 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 1 [2022-03-20 17:53:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 17:53:07,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124737350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:07,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:07,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 36 [2022-03-20 17:53:07,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738048694] [2022-03-20 17:53:07,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738048694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:07,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:07,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:53:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677977182] [2022-03-20 17:53:07,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:07,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:53:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:53:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:53:07,674 INFO L87 Difference]: Start difference. First operand 1442 states and 1632 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:20,670 INFO L93 Difference]: Finished difference Result 7635 states and 8725 transitions. [2022-03-20 17:53:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:53:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 17:53:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:20,678 INFO L225 Difference]: With dead ends: 7635 [2022-03-20 17:53:20,678 INFO L226 Difference]: Without dead ends: 7586 [2022-03-20 17:53:20,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 17:53:20,679 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 440 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:20,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 271 Invalid, 3530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 17:53:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7586 states. [2022-03-20 17:53:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7586 to 1444. [2022-03-20 17:53:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1439 states have (on average 1.1334259902710215) internal successors, (1631), 1439 states have internal predecessors, (1631), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1635 transitions. [2022-03-20 17:53:22,837 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1635 transitions. Word has length 83 [2022-03-20 17:53:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:22,837 INFO L478 AbstractCegarLoop]: Abstraction has 1444 states and 1635 transitions. [2022-03-20 17:53:22,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1635 transitions. [2022-03-20 17:53:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:53:22,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:22,840 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:22,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 17:53:23,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 17:53:23,064 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash -746829022, now seen corresponding path program 67 times [2022-03-20 17:53:23,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:23,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481425937] [2022-03-20 17:53:23,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:23,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -746829022, now seen corresponding path program 68 times [2022-03-20 17:53:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:23,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169564216] [2022-03-20 17:53:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:23,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:23,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:53:23,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169564216] [2022-03-20 17:53:23,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169564216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110721727] [2022-03-20 17:53:23,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:53:23,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:23,223 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:23,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 17:53:23,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:53:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 17:53:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:24,183 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:53:24,183 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 [2022-03-20 17:53:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 17:53:24,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:24,847 INFO L356 Elim1Store]: treesize reduction 78, result has 65.3 percent of original size [2022-03-20 17:53:24,847 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 56 treesize of output 162 [2022-03-20 17:53:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:53:25,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110721727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:25,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:25,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 17] total 46 [2022-03-20 17:53:25,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481425937] [2022-03-20 17:53:25,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481425937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:25,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:25,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:53:25,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112642112] [2022-03-20 17:53:25,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:25,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:53:25,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:53:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:53:25,374 INFO L87 Difference]: Start difference. First operand 1444 states and 1635 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2022-03-20 17:53:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:31,199 INFO L93 Difference]: Finished difference Result 3501 states and 3978 transitions. [2022-03-20 17:53:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:53:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 85 [2022-03-20 17:53:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:31,203 INFO L225 Difference]: With dead ends: 3501 [2022-03-20 17:53:31,203 INFO L226 Difference]: Without dead ends: 3260 [2022-03-20 17:53:31,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=3021, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 17:53:31,204 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 337 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:31,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 86 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:53:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2022-03-20 17:53:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 1634. [2022-03-20 17:53:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1629 states have (on average 1.1338244321669737) internal successors, (1847), 1629 states have internal predecessors, (1847), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:33,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 1851 transitions. [2022-03-20 17:53:33,640 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 1851 transitions. Word has length 85 [2022-03-20 17:53:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:33,640 INFO L478 AbstractCegarLoop]: Abstraction has 1634 states and 1851 transitions. [2022-03-20 17:53:33,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2022-03-20 17:53:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 1851 transitions. [2022-03-20 17:53:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:53:33,642 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:33,643 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:53:33,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 17:53:33,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:33,847 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash -13861041, now seen corresponding path program 69 times [2022-03-20 17:53:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480600640] [2022-03-20 17:53:33,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:33,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -13861041, now seen corresponding path program 70 times [2022-03-20 17:53:33,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:33,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216713863] [2022-03-20 17:53:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:53:34,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:34,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216713863] [2022-03-20 17:53:34,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216713863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:34,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224589421] [2022-03-20 17:53:34,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:53:34,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:34,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:34,099 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:34,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 17:53:34,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:53:34,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:34,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:53:34,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:34,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:53:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 17:53:34,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:34,904 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:53:34,905 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 [2022-03-20 17:53:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-20 17:53:35,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224589421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:35,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:35,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 11] total 39 [2022-03-20 17:53:35,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480600640] [2022-03-20 17:53:35,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480600640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:35,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:35,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:53:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586469529] [2022-03-20 17:53:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:35,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:53:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:53:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 17:53:35,003 INFO L87 Difference]: Start difference. First operand 1634 states and 1851 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:50,076 INFO L93 Difference]: Finished difference Result 8391 states and 9591 transitions. [2022-03-20 17:53:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:53:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 85 [2022-03-20 17:53:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:50,087 INFO L225 Difference]: With dead ends: 8391 [2022-03-20 17:53:50,087 INFO L226 Difference]: Without dead ends: 8342 [2022-03-20 17:53:50,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=2888, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 17:53:50,089 INFO L913 BasicCegarLoop]: 213 mSDtfsCounter, 488 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:50,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 290 Invalid, 3891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3859 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 17:53:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2022-03-20 17:53:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 1636. [2022-03-20 17:53:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1631 states have (on average 1.1342734518700184) internal successors, (1850), 1631 states have internal predecessors, (1850), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1854 transitions. [2022-03-20 17:53:52,588 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1854 transitions. Word has length 85 [2022-03-20 17:53:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:52,588 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1854 transitions. [2022-03-20 17:53:52,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:53:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1854 transitions. [2022-03-20 17:53:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:53:52,590 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:52,590 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:52,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 17:53:52,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:52,790 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1887668605, now seen corresponding path program 71 times [2022-03-20 17:53:52,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:52,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221821553] [2022-03-20 17:53:52,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:52,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1887668605, now seen corresponding path program 72 times [2022-03-20 17:53:52,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:52,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524301829] [2022-03-20 17:53:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:52,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 17:53:52,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:52,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524301829] [2022-03-20 17:53:52,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524301829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:52,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964689339] [2022-03-20 17:53:52,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:53:52,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:52,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:52,881 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:52,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 17:53:53,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 17:53:53,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:53:53,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:53,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:53:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 17:53:53,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:53,667 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:53:53,668 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 [2022-03-20 17:53:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 17:53:53,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964689339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:53,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:53,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 27 [2022-03-20 17:53:53,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221821553] [2022-03-20 17:53:53,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221821553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:53,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:53,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:53:53,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170480652] [2022-03-20 17:53:53,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:53,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:53:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:53:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:53:53,739 INFO L87 Difference]: Start difference. First operand 1636 states and 1854 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2022-03-20 17:53:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:59,421 INFO L93 Difference]: Finished difference Result 4774 states and 5480 transitions. [2022-03-20 17:53:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:53:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 85 [2022-03-20 17:53:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:59,426 INFO L225 Difference]: With dead ends: 4774 [2022-03-20 17:53:59,426 INFO L226 Difference]: Without dead ends: 3280 [2022-03-20 17:53:59,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 17:53:59,428 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:59,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 114 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:53:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-03-20 17:54:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 1509. [2022-03-20 17:54:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1504 states have (on average 1.1316489361702127) internal successors, (1702), 1504 states have internal predecessors, (1702), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1706 transitions. [2022-03-20 17:54:01,762 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1706 transitions. Word has length 85 [2022-03-20 17:54:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:01,762 INFO L478 AbstractCegarLoop]: Abstraction has 1509 states and 1706 transitions. [2022-03-20 17:54:01,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2022-03-20 17:54:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1706 transitions. [2022-03-20 17:54:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 17:54:01,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:01,764 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:01,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 17:54:01,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:01,964 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash -760945305, now seen corresponding path program 73 times [2022-03-20 17:54:01,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:01,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1581750593] [2022-03-20 17:54:01,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:01,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash -760945305, now seen corresponding path program 74 times [2022-03-20 17:54:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897410852] [2022-03-20 17:54:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:02,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:54:02,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:02,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897410852] [2022-03-20 17:54:02,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897410852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:02,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918501983] [2022-03-20 17:54:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:54:02,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:02,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:02,140 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:02,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 17:54:02,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:54:02,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 17:54:02,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:03,170 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:54:03,170 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 [2022-03-20 17:54:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 17:54:03,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:03,840 INFO L356 Elim1Store]: treesize reduction 78, result has 65.3 percent of original size [2022-03-20 17:54:03,841 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 56 treesize of output 162 [2022-03-20 17:54:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:54:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918501983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:04,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:04,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 17] total 47 [2022-03-20 17:54:04,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1581750593] [2022-03-20 17:54:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1581750593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:04,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:04,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:54:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978210411] [2022-03-20 17:54:04,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:04,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:54:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:54:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:54:04,176 INFO L87 Difference]: Start difference. First operand 1509 states and 1706 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:11,315 INFO L93 Difference]: Finished difference Result 4026 states and 4581 transitions. [2022-03-20 17:54:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:54:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 87 [2022-03-20 17:54:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:11,319 INFO L225 Difference]: With dead ends: 4026 [2022-03-20 17:54:11,319 INFO L226 Difference]: Without dead ends: 3785 [2022-03-20 17:54:11,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 17:54:11,320 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 302 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:11,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 123 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:54:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2022-03-20 17:54:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 1509. [2022-03-20 17:54:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1504 states have (on average 1.1316489361702127) internal successors, (1702), 1504 states have internal predecessors, (1702), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1706 transitions. [2022-03-20 17:54:13,711 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1706 transitions. Word has length 87 [2022-03-20 17:54:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:13,711 INFO L478 AbstractCegarLoop]: Abstraction has 1509 states and 1706 transitions. [2022-03-20 17:54:13,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1706 transitions. [2022-03-20 17:54:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 17:54:13,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:13,713 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:54:13,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 17:54:13,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 17:54:13,914 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash -27977324, now seen corresponding path program 75 times [2022-03-20 17:54:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:13,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620669633] [2022-03-20 17:54:13,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:13,915 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash -27977324, now seen corresponding path program 76 times [2022-03-20 17:54:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:13,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464651339] [2022-03-20 17:54:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:14,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:54:14,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:14,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464651339] [2022-03-20 17:54:14,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464651339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:14,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438278478] [2022-03-20 17:54:14,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:54:14,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:14,195 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:14,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 17:54:14,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:54:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:14,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:54:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:14,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:54:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 17:54:14,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:15,037 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:54:15,037 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 [2022-03-20 17:54:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 12 proven. 90 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-03-20 17:54:15,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438278478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:15,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:15,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 11] total 40 [2022-03-20 17:54:15,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:15,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620669633] [2022-03-20 17:54:15,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620669633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:15,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:15,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 17:54:15,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646408905] [2022-03-20 17:54:15,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:15,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 17:54:15,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 17:54:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:54:15,140 INFO L87 Difference]: Start difference. First operand 1509 states and 1706 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:32,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:32,960 INFO L93 Difference]: Finished difference Result 9020 states and 10309 transitions. [2022-03-20 17:54:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:54:32,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 17:54:32,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:32,971 INFO L225 Difference]: With dead ends: 9020 [2022-03-20 17:54:32,972 INFO L226 Difference]: Without dead ends: 8971 [2022-03-20 17:54:32,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 17:54:32,973 INFO L913 BasicCegarLoop]: 232 mSDtfsCounter, 520 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:32,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 319 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4737 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:54:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-03-20 17:54:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 1511. [2022-03-20 17:54:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1506 states have (on average 1.1321381142098275) internal successors, (1705), 1506 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1709 transitions. [2022-03-20 17:54:35,500 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1709 transitions. Word has length 87 [2022-03-20 17:54:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:35,500 INFO L478 AbstractCegarLoop]: Abstraction has 1511 states and 1709 transitions. [2022-03-20 17:54:35,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1709 transitions. [2022-03-20 17:54:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 17:54:35,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:35,501 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:35,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 17:54:35,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 17:54:35,702 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1441791380, now seen corresponding path program 77 times [2022-03-20 17:54:35,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:35,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1361694351] [2022-03-20 17:54:35,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:35,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1441791380, now seen corresponding path program 78 times [2022-03-20 17:54:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264434195] [2022-03-20 17:54:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:35,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:54:35,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:35,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264434195] [2022-03-20 17:54:35,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264434195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:35,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379121487] [2022-03-20 17:54:35,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:54:35,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:35,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:35,874 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:35,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 17:54:36,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 17:54:36,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 17:54:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:54:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:54:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:54:37,893 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:54:37,893 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 29 treesize of output 14 [2022-03-20 17:54:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 27 proven. 117 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 17:54:37,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:39,022 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-03-20 17:54:39,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2022-03-20 17:54:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-03-20 17:54:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379121487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:39,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:39,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30, 21] total 61 [2022-03-20 17:54:39,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1361694351] [2022-03-20 17:54:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1361694351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:39,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:39,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:54:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215291979] [2022-03-20 17:54:39,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:39,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:54:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:54:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=3151, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 17:54:39,052 INFO L87 Difference]: Start difference. First operand 1511 states and 1709 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:48,377 INFO L93 Difference]: Finished difference Result 4818 states and 5483 transitions. [2022-03-20 17:54:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:54:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 89 [2022-03-20 17:54:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:48,383 INFO L225 Difference]: With dead ends: 4818 [2022-03-20 17:54:48,384 INFO L226 Difference]: Without dead ends: 4577 [2022-03-20 17:54:48,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 17:54:48,385 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 365 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:48,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 142 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:54:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4577 states. [2022-03-20 17:54:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4577 to 1511. [2022-03-20 17:54:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1506 states have (on average 1.1321381142098275) internal successors, (1705), 1506 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1709 transitions. [2022-03-20 17:54:50,911 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1709 transitions. Word has length 89 [2022-03-20 17:54:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:50,911 INFO L478 AbstractCegarLoop]: Abstraction has 1511 states and 1709 transitions. [2022-03-20 17:54:50,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:54:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1709 transitions. [2022-03-20 17:54:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 17:54:50,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:50,913 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:54:50,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 17:54:51,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:51,114 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash -708823399, now seen corresponding path program 79 times [2022-03-20 17:54:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:51,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1366244928] [2022-03-20 17:54:51,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:51,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -708823399, now seen corresponding path program 80 times [2022-03-20 17:54:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:51,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895238343] [2022-03-20 17:54:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:51,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:54:51,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:51,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895238343] [2022-03-20 17:54:51,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895238343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:51,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149936243] [2022-03-20 17:54:51,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:54:51,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:51,416 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:51,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 17:54:51,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:54:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:54:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:52,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:54:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-20 17:54:52,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:52,295 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:54:52,295 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 [2022-03-20 17:54:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 13 proven. 95 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 17:54:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149936243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:52,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:52,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 11] total 41 [2022-03-20 17:54:52,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1366244928] [2022-03-20 17:54:52,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1366244928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:52,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:52,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:54:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928046580] [2022-03-20 17:54:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:52,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:54:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:52,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:54:52,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 17:54:52,396 INFO L87 Difference]: Start difference. First operand 1511 states and 1709 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-03-20 17:55:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:13,167 INFO L93 Difference]: Finished difference Result 9776 states and 11175 transitions. [2022-03-20 17:55:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:55:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 89 [2022-03-20 17:55:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:13,179 INFO L225 Difference]: With dead ends: 9776 [2022-03-20 17:55:13,179 INFO L226 Difference]: Without dead ends: 9727 [2022-03-20 17:55:13,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=3336, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 17:55:13,180 INFO L913 BasicCegarLoop]: 251 mSDtfsCounter, 560 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:55:13,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 343 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 17:55:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2022-03-20 17:55:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 1513. [2022-03-20 17:55:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1508 states have (on average 1.1326259946949602) internal successors, (1708), 1508 states have internal predecessors, (1708), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:55:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1712 transitions. [2022-03-20 17:55:15,829 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1712 transitions. Word has length 89 [2022-03-20 17:55:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:15,829 INFO L478 AbstractCegarLoop]: Abstraction has 1513 states and 1712 transitions. [2022-03-20 17:55:15,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-03-20 17:55:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1712 transitions. [2022-03-20 17:55:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 17:55:15,830 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:15,831 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:15,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 17:55:16,031 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 [2022-03-20 17:55:16,031 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1395126833, now seen corresponding path program 81 times [2022-03-20 17:55:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624748198] [2022-03-20 17:55:16,032 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:55:16,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:55:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1395126833, now seen corresponding path program 82 times [2022-03-20 17:55:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729543728] [2022-03-20 17:55:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:16,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:16,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:55:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729543728] [2022-03-20 17:55:16,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729543728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:55:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038562717] [2022-03-20 17:55:16,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:55:16,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:16,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:55:16,240 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) [2022-03-20 17:55:16,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 17:55:16,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:55:16,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:55:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 17:55:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:55:17,303 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:55:17,303 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 14 [2022-03-20 17:55:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 17:55:17,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:55:19,748 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 17:55:19,749 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 48 treesize of output 37 [2022-03-20 17:55:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-20 17:55:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038562717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:55:19,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:55:19,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 18] total 51 [2022-03-20 17:55:19,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624748198] [2022-03-20 17:55:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624748198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:19,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:55:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848839296] [2022-03-20 17:55:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:19,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:55:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:55:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2320, Unknown=2, NotChecked=0, Total=2550 [2022-03-20 17:55:19,808 INFO L87 Difference]: Start difference. First operand 1513 states and 1712 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:55:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:31,382 INFO L93 Difference]: Finished difference Result 5528 states and 6295 transitions. [2022-03-20 17:55:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:55:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 91 [2022-03-20 17:55:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:31,387 INFO L225 Difference]: With dead ends: 5528 [2022-03-20 17:55:31,388 INFO L226 Difference]: Without dead ends: 5287 [2022-03-20 17:55:31,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=311, Invalid=3977, Unknown=2, NotChecked=0, Total=4290 [2022-03-20 17:55:31,389 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 383 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:55:31,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 166 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:55:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5287 states. [2022-03-20 17:55:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5287 to 1467. [2022-03-20 17:55:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1462 states have (on average 1.131326949384405) internal successors, (1654), 1462 states have internal predecessors, (1654), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:55:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1658 transitions. [2022-03-20 17:55:33,996 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1658 transitions. Word has length 91 [2022-03-20 17:55:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:33,996 INFO L478 AbstractCegarLoop]: Abstraction has 1467 states and 1658 transitions. [2022-03-20 17:55:33,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:55:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1658 transitions. [2022-03-20 17:55:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 17:55:33,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:33,997 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:55:34,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 17:55:34,199 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 [2022-03-20 17:55:34,199 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2128094814, now seen corresponding path program 83 times [2022-03-20 17:55:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1245928784] [2022-03-20 17:55:34,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:55:34,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:55:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2128094814, now seen corresponding path program 84 times [2022-03-20 17:55:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812364520] [2022-03-20 17:55:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:34,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:55:34,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812364520] [2022-03-20 17:55:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812364520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:55:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837415774] [2022-03-20 17:55:34,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:55:34,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:55:34,487 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) [2022-03-20 17:55:34,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 17:55:34,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:55:34,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:55:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 17:55:34,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:55:35,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:55:35,313 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:55:35,314 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 17 treesize of output 10 [2022-03-20 17:55:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-03-20 17:55:35,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:55:35,689 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 17:55:35,689 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 1 [2022-03-20 17:55:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-03-20 17:55:35,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837415774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:55:35,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:55:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 11] total 40 [2022-03-20 17:55:35,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1245928784] [2022-03-20 17:55:35,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1245928784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:35,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 17:55:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355032295] [2022-03-20 17:55:35,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:35,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 17:55:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 17:55:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:55:35,735 INFO L87 Difference]: Start difference. First operand 1467 states and 1658 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:55:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:59,830 INFO L93 Difference]: Finished difference Result 10532 states and 12041 transitions. [2022-03-20 17:55:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:55:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-20 17:55:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:59,841 INFO L225 Difference]: With dead ends: 10532 [2022-03-20 17:55:59,841 INFO L226 Difference]: Without dead ends: 10483 [2022-03-20 17:55:59,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=3228, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 17:55:59,843 INFO L913 BasicCegarLoop]: 270 mSDtfsCounter, 591 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6156 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:55:59,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 367 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6156 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 17:55:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2022-03-20 17:56:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 1469. [2022-03-20 17:56:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1464 states have (on average 1.1318306010928962) internal successors, (1657), 1464 states have internal predecessors, (1657), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1661 transitions. [2022-03-20 17:56:02,581 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1661 transitions. Word has length 91 [2022-03-20 17:56:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:02,581 INFO L478 AbstractCegarLoop]: Abstraction has 1469 states and 1661 transitions. [2022-03-20 17:56:02,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1661 transitions. [2022-03-20 17:56:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 17:56:02,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:02,583 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:02,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 17:56:02,784 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 [2022-03-20 17:56:02,784 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1388329719, now seen corresponding path program 85 times [2022-03-20 17:56:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285036368] [2022-03-20 17:56:02,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:02,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1388329719, now seen corresponding path program 86 times [2022-03-20 17:56:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:02,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143110028] [2022-03-20 17:56:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:02,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 54 proven. 76 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-20 17:56:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143110028] [2022-03-20 17:56:02,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143110028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898321292] [2022-03-20 17:56:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:56:02,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:02,929 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) [2022-03-20 17:56:02,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 17:56:03,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:56:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:03,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:56:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:03,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:56:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-20 17:56:03,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:03,778 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:56:03,778 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 [2022-03-20 17:56:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-03-20 17:56:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898321292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:03,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2022-03-20 17:56:03,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285036368] [2022-03-20 17:56:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285036368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:03,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:03,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:56:03,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285117514] [2022-03-20 17:56:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:03,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:56:03,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:56:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-03-20 17:56:03,858 INFO L87 Difference]: Start difference. First operand 1469 states and 1661 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:07,307 INFO L93 Difference]: Finished difference Result 2373 states and 2686 transitions. [2022-03-20 17:56:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:56:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 92 [2022-03-20 17:56:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:07,309 INFO L225 Difference]: With dead ends: 2373 [2022-03-20 17:56:07,309 INFO L226 Difference]: Without dead ends: 1507 [2022-03-20 17:56:07,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 17:56:07,310 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 143 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:07,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 93 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:56:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-20 17:56:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1272. [2022-03-20 17:56:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1267 states have (on average 1.1286503551696923) internal successors, (1430), 1267 states have internal predecessors, (1430), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1434 transitions. [2022-03-20 17:56:09,745 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1434 transitions. Word has length 92 [2022-03-20 17:56:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:09,745 INFO L478 AbstractCegarLoop]: Abstraction has 1272 states and 1434 transitions. [2022-03-20 17:56:09,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1434 transitions. [2022-03-20 17:56:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:56:09,747 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:09,747 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:09,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 17:56:09,947 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 [2022-03-20 17:56:09,947 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 87 times [2022-03-20 17:56:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:09,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105495376] [2022-03-20 17:56:09,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:09,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 88 times [2022-03-20 17:56:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:09,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050057853] [2022-03-20 17:56:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:10,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:56:10,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:10,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050057853] [2022-03-20 17:56:10,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050057853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:10,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564169945] [2022-03-20 17:56:10,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:56:10,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:10,116 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) [2022-03-20 17:56:10,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 17:56:10,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:56:10,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 17:56:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:56:10,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:56:10,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564169945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:10,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:10,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-20 17:56:10,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105495376] [2022-03-20 17:56:10,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105495376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:10,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:10,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:56:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126945657] [2022-03-20 17:56:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:10,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:56:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:56:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:56:10,922 INFO L87 Difference]: Start difference. First operand 1272 states and 1434 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 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) [2022-03-20 17:56:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:15,172 INFO L93 Difference]: Finished difference Result 1719 states and 1938 transitions. [2022-03-20 17:56:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:56:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 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 93 [2022-03-20 17:56:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:15,175 INFO L225 Difference]: With dead ends: 1719 [2022-03-20 17:56:15,175 INFO L226 Difference]: Without dead ends: 1714 [2022-03-20 17:56:15,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:56:15,176 INFO L913 BasicCegarLoop]: 139 mSDtfsCounter, 258 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:15,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 186 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:56:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-03-20 17:56:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1449. [2022-03-20 17:56:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1444 states have (on average 1.1336565096952909) internal successors, (1637), 1444 states have internal predecessors, (1637), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1641 transitions. [2022-03-20 17:56:18,192 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1641 transitions. Word has length 93 [2022-03-20 17:56:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:18,192 INFO L478 AbstractCegarLoop]: Abstraction has 1449 states and 1641 transitions. [2022-03-20 17:56:18,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 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) [2022-03-20 17:56:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1641 transitions. [2022-03-20 17:56:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:56:18,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:18,194 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:18,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 17:56:18,394 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 [2022-03-20 17:56:18,394 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 89 times [2022-03-20 17:56:18,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:18,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613690168] [2022-03-20 17:56:18,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:18,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 90 times [2022-03-20 17:56:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940985526] [2022-03-20 17:56:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:19,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 17:56:19,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940985526] [2022-03-20 17:56:19,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940985526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:19,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022259620] [2022-03-20 17:56:19,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:56:19,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:19,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:19,370 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) [2022-03-20 17:56:19,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 17:56:19,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 17:56:19,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 17:56:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:19,635 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:56:19,635 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 [2022-03-20 17:56:19,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 17:56:19,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 17:56:19,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 17:56:19,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 17:56:19,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 17:56:21,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-03-20 17:56:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 124 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 17:56:21,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 78 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 17:56:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022259620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:21,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:21,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 20] total 60 [2022-03-20 17:56:21,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613690168] [2022-03-20 17:56:21,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613690168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:21,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 17:56:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957284696] [2022-03-20 17:56:21,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:21,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 17:56:21,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 17:56:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3042, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 17:56:21,854 INFO L87 Difference]: Start difference. First operand 1449 states and 1641 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:26,887 INFO L93 Difference]: Finished difference Result 1826 states and 2045 transitions. [2022-03-20 17:56:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:56:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 93 [2022-03-20 17:56:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:26,890 INFO L225 Difference]: With dead ends: 1826 [2022-03-20 17:56:26,890 INFO L226 Difference]: Without dead ends: 1785 [2022-03-20 17:56:26,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=773, Invalid=5079, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 17:56:26,891 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 271 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:26,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 86 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:56:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-03-20 17:56:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1557. [2022-03-20 17:56:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1552 states have (on average 1.1243556701030928) internal successors, (1745), 1552 states have internal predecessors, (1745), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 1749 transitions. [2022-03-20 17:56:30,151 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 1749 transitions. Word has length 93 [2022-03-20 17:56:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:30,151 INFO L478 AbstractCegarLoop]: Abstraction has 1557 states and 1749 transitions. [2022-03-20 17:56:30,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 1749 transitions. [2022-03-20 17:56:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:56:30,153 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:30,153 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:30,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 17:56:30,353 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 [2022-03-20 17:56:30,354 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 91 times [2022-03-20 17:56:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:30,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757260859] [2022-03-20 17:56:30,355 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:30,355 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 92 times [2022-03-20 17:56:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:30,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904330441] [2022-03-20 17:56:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 17:56:31,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:31,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904330441] [2022-03-20 17:56:31,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904330441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:31,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876082046] [2022-03-20 17:56:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:56:31,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:31,393 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) [2022-03-20 17:56:31,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 17:56:31,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:56:31,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:56:31,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:56:32,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:56:32,308 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:56:32,308 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 [2022-03-20 17:56:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 145 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:56:32,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:32,619 INFO L356 Elim1Store]: treesize reduction 33, result has 66.0 percent of original size [2022-03-20 17:56:32,620 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 71 [2022-03-20 17:56:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-20 17:56:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876082046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:32,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:32,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 15] total 47 [2022-03-20 17:56:32,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:32,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757260859] [2022-03-20 17:56:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757260859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:32,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:32,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:56:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691732184] [2022-03-20 17:56:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:32,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:56:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:56:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:56:32,835 INFO L87 Difference]: Start difference. First operand 1557 states and 1749 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:38,308 INFO L93 Difference]: Finished difference Result 1810 states and 2025 transitions. [2022-03-20 17:56:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:56:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 17:56:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:38,310 INFO L225 Difference]: With dead ends: 1810 [2022-03-20 17:56:38,310 INFO L226 Difference]: Without dead ends: 1766 [2022-03-20 17:56:38,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=498, Invalid=3792, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 17:56:38,311 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 225 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:38,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 127 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:56:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-03-20 17:56:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1534. [2022-03-20 17:56:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1529 states have (on average 1.1262262916939176) internal successors, (1722), 1529 states have internal predecessors, (1722), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1726 transitions. [2022-03-20 17:56:41,553 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1726 transitions. Word has length 93 [2022-03-20 17:56:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:41,553 INFO L478 AbstractCegarLoop]: Abstraction has 1534 states and 1726 transitions. [2022-03-20 17:56:41,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1726 transitions. [2022-03-20 17:56:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:56:41,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:41,555 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:41,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 17:56:41,755 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 [2022-03-20 17:56:41,756 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 93 times [2022-03-20 17:56:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [784139535] [2022-03-20 17:56:41,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:41,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 94 times [2022-03-20 17:56:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:41,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113240548] [2022-03-20 17:56:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 17:56:42,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113240548] [2022-03-20 17:56:42,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113240548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895318449] [2022-03-20 17:56:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:56:42,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:42,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:42,393 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) [2022-03-20 17:56:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 17:56:42,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:56:42,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 17:56:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:56:43,174 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:56:43,174 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 29 treesize of output 14 [2022-03-20 17:56:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 112 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 17:56:43,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:43,423 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-03-20 17:56:43,423 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 34 treesize of output 75 [2022-03-20 17:56:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 17:56:43,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895318449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:43,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:43,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 39 [2022-03-20 17:56:43,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [784139535] [2022-03-20 17:56:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [784139535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:43,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:43,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:56:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648938376] [2022-03-20 17:56:43,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:43,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:56:43,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:43,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:56:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 17:56:43,586 INFO L87 Difference]: Start difference. First operand 1534 states and 1726 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:48,801 INFO L93 Difference]: Finished difference Result 1789 states and 2000 transitions. [2022-03-20 17:56:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:56:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 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 93 [2022-03-20 17:56:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:48,803 INFO L225 Difference]: With dead ends: 1789 [2022-03-20 17:56:48,803 INFO L226 Difference]: Without dead ends: 1771 [2022-03-20 17:56:48,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 170 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 17:56:48,804 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 201 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:48,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 105 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:56:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-03-20 17:56:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1631. [2022-03-20 17:56:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1626 states have (on average 1.1186961869618697) internal successors, (1819), 1626 states have internal predecessors, (1819), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 1823 transitions. [2022-03-20 17:56:52,529 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 1823 transitions. Word has length 93 [2022-03-20 17:56:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:52,529 INFO L478 AbstractCegarLoop]: Abstraction has 1631 states and 1823 transitions. [2022-03-20 17:56:52,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:56:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 1823 transitions. [2022-03-20 17:56:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:56:52,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:52,531 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:52,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 17:56:52,731 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 [2022-03-20 17:56:52,732 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:52,732 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 95 times [2022-03-20 17:56:52,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:52,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255631467] [2022-03-20 17:56:52,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:52,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 96 times [2022-03-20 17:56:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:52,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359396385] [2022-03-20 17:56:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 17:56:53,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:53,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359396385] [2022-03-20 17:56:53,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359396385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:53,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052345117] [2022-03-20 17:56:53,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:56:53,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:53,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:53,657 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) [2022-03-20 17:56:53,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 17:56:53,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 17:56:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 17:56:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:56:54,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:56:54,645 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:56:54,645 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 29 treesize of output 14 [2022-03-20 17:56:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-20 17:56:54,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:54,917 INFO L356 Elim1Store]: treesize reduction 27, result has 72.2 percent of original size [2022-03-20 17:56:54,917 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 77 [2022-03-20 17:56:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-20 17:56:55,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052345117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:55,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:55,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 15] total 46 [2022-03-20 17:56:55,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255631467] [2022-03-20 17:56:55,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255631467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:55,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:55,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:56:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354800296] [2022-03-20 17:56:55,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:55,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:56:55,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:56:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1820, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:56:55,134 INFO L87 Difference]: Start difference. First operand 1631 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:00,652 INFO L93 Difference]: Finished difference Result 1778 states and 1985 transitions. [2022-03-20 17:57:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:57:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 17:57:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:00,654 INFO L225 Difference]: With dead ends: 1778 [2022-03-20 17:57:00,655 INFO L226 Difference]: Without dead ends: 1760 [2022-03-20 17:57:00,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=542, Invalid=3880, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 17:57:00,655 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 242 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:00,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 95 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:57:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-20 17:57:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1606. [2022-03-20 17:57:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1601 states have (on average 1.1205496564647095) internal successors, (1794), 1601 states have internal predecessors, (1794), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1798 transitions. [2022-03-20 17:57:04,315 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1798 transitions. Word has length 93 [2022-03-20 17:57:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:04,315 INFO L478 AbstractCegarLoop]: Abstraction has 1606 states and 1798 transitions. [2022-03-20 17:57:04,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1798 transitions. [2022-03-20 17:57:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:57:04,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:04,317 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:04,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 17:57:04,519 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 [2022-03-20 17:57:04,519 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash 369296566, now seen corresponding path program 97 times [2022-03-20 17:57:04,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829042850] [2022-03-20 17:57:04,520 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:04,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 369296566, now seen corresponding path program 98 times [2022-03-20 17:57:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:04,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460671563] [2022-03-20 17:57:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 17:57:04,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460671563] [2022-03-20 17:57:04,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460671563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861691365] [2022-03-20 17:57:04,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:04,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:04,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:04,710 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) [2022-03-20 17:57:04,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 17:57:04,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:57:04,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:04,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 17:57:04,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:05,759 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 17:57:05,760 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 [2022-03-20 17:57:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-20 17:57:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:06,453 INFO L356 Elim1Store]: treesize reduction 78, result has 65.3 percent of original size [2022-03-20 17:57:06,453 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 56 treesize of output 162 [2022-03-20 17:57:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 17:57:06,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861691365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:06,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:06,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 17] total 50 [2022-03-20 17:57:06,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829042850] [2022-03-20 17:57:06,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829042850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:06,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:06,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:57:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776567905] [2022-03-20 17:57:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:06,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:57:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:57:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 17:57:06,766 INFO L87 Difference]: Start difference. First operand 1606 states and 1798 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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) [2022-03-20 17:57:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:26,569 INFO L93 Difference]: Finished difference Result 7188 states and 8166 transitions. [2022-03-20 17:57:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:57:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 93 [2022-03-20 17:57:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:26,577 INFO L225 Difference]: With dead ends: 7188 [2022-03-20 17:57:26,577 INFO L226 Difference]: Without dead ends: 6970 [2022-03-20 17:57:26,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 17:57:26,578 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 577 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2005 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:26,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 181 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:57:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6970 states. [2022-03-20 17:57:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6970 to 1606. [2022-03-20 17:57:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1601 states have (on average 1.1205496564647095) internal successors, (1794), 1601 states have internal predecessors, (1794), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:57:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1798 transitions. [2022-03-20 17:57:30,376 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1798 transitions. Word has length 93 [2022-03-20 17:57:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:30,376 INFO L478 AbstractCegarLoop]: Abstraction has 1606 states and 1798 transitions. [2022-03-20 17:57:30,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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) [2022-03-20 17:57:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1798 transitions. [2022-03-20 17:57:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:57:30,378 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:30,378 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 5, 5, 4, 4, 3, 2, 2, 2, 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] [2022-03-20 17:57:30,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-20 17:57:30,579 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 [2022-03-20 17:57:30,579 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1102264547, now seen corresponding path program 99 times [2022-03-20 17:57:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [607692106] [2022-03-20 17:57:30,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:30,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1102264547, now seen corresponding path program 100 times [2022-03-20 17:57:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:30,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983991795] [2022-03-20 17:57:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 17:57:30,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983991795] [2022-03-20 17:57:30,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983991795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182246892] [2022-03-20 17:57:30,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:57:30,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:30,900 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) [2022-03-20 17:57:30,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 17:57:31,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:57:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 17:57:31,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:31,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 17:57:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-20 17:57:31,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:31,801 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:57:31,801 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 [2022-03-20 17:57:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-20 17:57:31,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182246892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:31,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:31,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 11] total 43 [2022-03-20 17:57:31,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:31,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [607692106] [2022-03-20 17:57:31,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [607692106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:31,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:31,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:57:31,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527584405] [2022-03-20 17:57:31,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:31,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:57:31,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:57:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:57:31,914 INFO L87 Difference]: Start difference. First operand 1606 states and 1798 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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) [2022-03-20 17:58:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:12,167 INFO L93 Difference]: Finished difference Result 13920 states and 15881 transitions. [2022-03-20 17:58:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:58:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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 93 [2022-03-20 17:58:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:12,183 INFO L225 Difference]: With dead ends: 13920 [2022-03-20 17:58:12,183 INFO L226 Difference]: Without dead ends: 13871 [2022-03-20 17:58:12,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=3816, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 17:58:12,186 INFO L913 BasicCegarLoop]: 289 mSDtfsCounter, 638 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6607 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 6607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:12,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 386 Invalid, 6643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 6607 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 17:58:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13871 states. [2022-03-20 17:58:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13871 to 1608. [2022-03-20 17:58:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1603 states have (on average 1.1210230817217717) internal successors, (1797), 1603 states have internal predecessors, (1797), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1801 transitions. [2022-03-20 17:58:16,096 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1801 transitions. Word has length 93 [2022-03-20 17:58:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:16,097 INFO L478 AbstractCegarLoop]: Abstraction has 1608 states and 1801 transitions. [2022-03-20 17:58:16,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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) [2022-03-20 17:58:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1801 transitions. [2022-03-20 17:58:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 17:58:16,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:16,099 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:16,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:16,299 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 [2022-03-20 17:58:16,299 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1074909082, now seen corresponding path program 101 times [2022-03-20 17:58:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:16,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1080829911] [2022-03-20 17:58:16,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:16,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1074909082, now seen corresponding path program 102 times [2022-03-20 17:58:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907242969] [2022-03-20 17:58:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-20 17:58:16,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907242969] [2022-03-20 17:58:16,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907242969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811365300] [2022-03-20 17:58:16,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:58:16,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:16,572 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) [2022-03-20 17:58:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 17:58:16,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 17:58:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:58:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:17,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:58:17,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:58:17,236 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 18 treesize of output 11 [2022-03-20 17:58:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-20 17:58:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:17,410 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 17:58:17,410 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 [2022-03-20 17:58:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-20 17:58:17,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811365300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:17,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:17,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 24 [2022-03-20 17:58:17,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1080829911] [2022-03-20 17:58:17,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1080829911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:17,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:17,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:58:17,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547168156] [2022-03-20 17:58:17,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:17,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:58:17,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:58:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:58:17,470 INFO L87 Difference]: Start difference. First operand 1608 states and 1801 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:23,175 INFO L93 Difference]: Finished difference Result 1979 states and 2214 transitions. [2022-03-20 17:58:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:58:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 17:58:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:23,177 INFO L225 Difference]: With dead ends: 1979 [2022-03-20 17:58:23,177 INFO L226 Difference]: Without dead ends: 1974 [2022-03-20 17:58:23,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:58:23,178 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 180 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:23,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 67 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:58:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-03-20 17:58:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1665. [2022-03-20 17:58:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1660 states have (on average 1.1180722891566266) internal successors, (1856), 1660 states have internal predecessors, (1856), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1860 transitions. [2022-03-20 17:58:27,399 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1860 transitions. Word has length 94 [2022-03-20 17:58:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:27,399 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1860 transitions. [2022-03-20 17:58:27,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1860 transitions. [2022-03-20 17:58:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 17:58:27,401 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:27,401 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:27,602 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 [2022-03-20 17:58:27,602 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 103 times [2022-03-20 17:58:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:27,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722736322] [2022-03-20 17:58:27,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:27,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 104 times [2022-03-20 17:58:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:27,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655651563] [2022-03-20 17:58:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 17:58:27,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:27,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655651563] [2022-03-20 17:58:27,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655651563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:27,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460335760] [2022-03-20 17:58:27,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:58:27,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:27,788 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) [2022-03-20 17:58:27,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 17:58:27,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:58:27,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:58:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 17:58:27,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:58:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:58:29,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:58:29,908 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-20 17:58:29,909 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 55 treesize of output 24 [2022-03-20 17:58:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 42 proven. 110 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-20 17:58:29,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:58:31,679 INFO L356 Elim1Store]: treesize reduction 144, result has 29.8 percent of original size [2022-03-20 17:58:31,680 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 63 treesize of output 79 [2022-03-20 17:58:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 17:58:31,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460335760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:58:31,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:58:31,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 23] total 63 [2022-03-20 17:58:31,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722736322] [2022-03-20 17:58:31,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722736322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:31,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:31,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:58:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818196984] [2022-03-20 17:58:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:31,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:58:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:58:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=3416, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 17:58:31,759 INFO L87 Difference]: Start difference. First operand 1665 states and 1860 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:55,027 INFO L93 Difference]: Finished difference Result 7872 states and 8903 transitions. [2022-03-20 17:58:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:58:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 17:58:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:55,036 INFO L225 Difference]: With dead ends: 7872 [2022-03-20 17:58:55,036 INFO L226 Difference]: Without dead ends: 7754 [2022-03-20 17:58:55,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=678, Invalid=5484, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 17:58:55,037 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 444 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:55,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 196 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:58:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2022-03-20 17:58:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 1711. [2022-03-20 17:58:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-03-20 17:58:59,393 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 96 [2022-03-20 17:58:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:59,393 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-03-20 17:58:59,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:58:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-03-20 17:58:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 17:58:59,395 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:59,395 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:59,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 17:58:59,597 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 [2022-03-20 17:58:59,597 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 105 times [2022-03-20 17:58:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:59,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545202130] [2022-03-20 17:58:59,598 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:58:59,598 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:58:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 106 times [2022-03-20 17:58:59,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:59,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977291395] [2022-03-20 17:58:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:59,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:59,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 17:58:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977291395] [2022-03-20 17:58:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977291395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:58:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160548568] [2022-03-20 17:58:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:58:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:58:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:58:59,797 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) [2022-03-20 17:58:59,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 17:58:59,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:58:59,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 17:59:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-20 17:59:00,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 17:59:00,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160548568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:00,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:00,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 38 [2022-03-20 17:59:00,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:00,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545202130] [2022-03-20 17:59:00,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545202130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:00,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:00,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:59:00,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812328610] [2022-03-20 17:59:00,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:00,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:59:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:59:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:59:00,823 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 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) [2022-03-20 17:59:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:59:27,221 INFO L93 Difference]: Finished difference Result 8755 states and 9907 transitions. [2022-03-20 17:59:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:59:27,222 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 98 [2022-03-20 17:59:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:59:27,231 INFO L225 Difference]: With dead ends: 8755 [2022-03-20 17:59:27,231 INFO L226 Difference]: Without dead ends: 8637 [2022-03-20 17:59:27,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 17:59:27,232 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 488 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:59:27,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 220 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 17:59:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2022-03-20 17:59:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 1711. [2022-03-20 17:59:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:59:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-03-20 17:59:31,634 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 98 [2022-03-20 17:59:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:59:31,634 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-03-20 17:59:31,634 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) [2022-03-20 17:59:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-03-20 17:59:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 17:59:31,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:59:31,636 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:59:31,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 17:59:31,836 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 [2022-03-20 17:59:31,836 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:59:31,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:59:31,837 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 107 times [2022-03-20 17:59:31,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1467378157] [2022-03-20 17:59:31,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:59:31,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:59:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 108 times [2022-03-20 17:59:31,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:59:31,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385861363] [2022-03-20 17:59:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:59:31,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:59:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:59:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:59:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 17:59:32,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:59:32,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385861363] [2022-03-20 17:59:32,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385861363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:59:32,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347622208] [2022-03-20 17:59:32,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:59:32,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:59:32,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:59:32,046 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) [2022-03-20 17:59:32,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 17:59:33,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 17:59:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:59:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 17:59:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:59:33,818 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 15 treesize of output 11 [2022-03-20 17:59:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 51 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 17:59:40,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:59:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-20 17:59:44,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347622208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:59:44,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:59:44,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35, 33] total 83 [2022-03-20 17:59:44,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:59:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1467378157] [2022-03-20 17:59:44,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1467378157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:59:44,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:59:44,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:59:44,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545848603] [2022-03-20 17:59:44,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:59:44,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:59:44,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:59:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:59:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=6136, Unknown=8, NotChecked=0, Total=6806 [2022-03-20 17:59:44,372 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:14,854 INFO L93 Difference]: Finished difference Result 9638 states and 10911 transitions. [2022-03-20 18:00:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:00:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-20 18:00:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:14,865 INFO L225 Difference]: With dead ends: 9638 [2022-03-20 18:00:14,865 INFO L226 Difference]: Without dead ends: 9520 [2022-03-20 18:00:14,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 131 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=848, Invalid=9244, Unknown=8, NotChecked=0, Total=10100 [2022-03-20 18:00:14,867 INFO L913 BasicCegarLoop]: 172 mSDtfsCounter, 525 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:14,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 244 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:00:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2022-03-20 18:00:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 1711. [2022-03-20 18:00:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-03-20 18:00:19,548 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 100 [2022-03-20 18:00:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:19,548 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-03-20 18:00:19,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-03-20 18:00:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:00:19,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:19,551 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:19,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:19,752 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 [2022-03-20 18:00:19,752 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1879577390, now seen corresponding path program 109 times [2022-03-20 18:00:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722709622] [2022-03-20 18:00:19,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:19,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:19,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1879577390, now seen corresponding path program 110 times [2022-03-20 18:00:19,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:19,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274031014] [2022-03-20 18:00:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:19,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 18:00:19,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274031014] [2022-03-20 18:00:19,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274031014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145383286] [2022-03-20 18:00:19,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:19,994 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) [2022-03-20 18:00:19,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 18:00:20,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:20,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 18:00:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 18:00:22,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:00:22,297 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-20 18:00:22,298 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 55 treesize of output 24 [2022-03-20 18:00:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 45 proven. 122 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-20 18:00:22,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:23,712 INFO L356 Elim1Store]: treesize reduction 130, result has 0.8 percent of original size [2022-03-20 18:00:23,712 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 59 treesize of output 1 [2022-03-20 18:00:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 49 proven. 58 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-20 18:00:23,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145383286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:23,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:23,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 22] total 65 [2022-03-20 18:00:23,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:23,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722709622] [2022-03-20 18:00:23,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722709622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:23,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:23,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:00:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910452740] [2022-03-20 18:00:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:23,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:00:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:00:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3697, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:00:23,753 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:58,125 INFO L93 Difference]: Finished difference Result 10521 states and 11915 transitions. [2022-03-20 18:00:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:00:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:00:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:58,138 INFO L225 Difference]: With dead ends: 10521 [2022-03-20 18:00:58,138 INFO L226 Difference]: Without dead ends: 10403 [2022-03-20 18:00:58,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:00:58,141 INFO L913 BasicCegarLoop]: 189 mSDtfsCounter, 561 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:58,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 266 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 18:00:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2022-03-20 18:01:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 1711. [2022-03-20 18:01:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-03-20 18:01:02,746 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 102 [2022-03-20 18:01:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:02,746 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-03-20 18:01:02,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-03-20 18:01:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 18:01:02,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:02,748 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:02,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:02,949 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 [2022-03-20 18:01:02,949 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:02,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1967412989, now seen corresponding path program 111 times [2022-03-20 18:01:02,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329813061] [2022-03-20 18:01:02,950 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:02,950 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1967412989, now seen corresponding path program 112 times [2022-03-20 18:01:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575115014] [2022-03-20 18:01:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 82 proven. 118 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 18:01:03,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:03,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575115014] [2022-03-20 18:01:03,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575115014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:03,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999066893] [2022-03-20 18:01:03,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:03,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:03,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:03,567 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) [2022-03-20 18:01:03,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 18:01:03,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:03,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 18:01:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:06,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 18:01:06,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 18:01:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 18:01:06,679 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-20 18:01:06,679 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 55 treesize of output 24 [2022-03-20 18:01:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 52 proven. 185 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 18:01:06,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:14,166 INFO L356 Elim1Store]: treesize reduction 138, result has 32.7 percent of original size [2022-03-20 18:01:14,167 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 63 treesize of output 85 [2022-03-20 18:01:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 61 proven. 153 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 18:01:14,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999066893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:14,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:14,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 37, 32] total 83 [2022-03-20 18:01:14,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:14,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329813061] [2022-03-20 18:01:14,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329813061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:14,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:14,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:01:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964324194] [2022-03-20 18:01:14,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:14,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:01:14,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:01:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=6033, Unknown=6, NotChecked=0, Total=6806 [2022-03-20 18:01:14,373 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:20,798 INFO L93 Difference]: Finished difference Result 1825 states and 2032 transitions. [2022-03-20 18:01:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:01:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-20 18:01:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:20,800 INFO L225 Difference]: With dead ends: 1825 [2022-03-20 18:01:20,800 INFO L226 Difference]: Without dead ends: 1233 [2022-03-20 18:01:20,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1020, Invalid=8676, Unknown=6, NotChecked=0, Total=9702 [2022-03-20 18:01:20,801 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 191 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:20,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 63 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-03-20 18:01:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2022-03-20 18:01:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1228 states have (on average 1.1441368078175895) internal successors, (1405), 1228 states have internal predecessors, (1405), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1409 transitions. [2022-03-20 18:01:24,447 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1409 transitions. Word has length 103 [2022-03-20 18:01:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:24,447 INFO L478 AbstractCegarLoop]: Abstraction has 1233 states and 1409 transitions. [2022-03-20 18:01:24,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1409 transitions. [2022-03-20 18:01:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 18:01:24,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:24,449 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:24,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:24,651 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 [2022-03-20 18:01:24,652 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1978314966, now seen corresponding path program 113 times [2022-03-20 18:01:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:24,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112883058] [2022-03-20 18:01:24,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:24,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1978314966, now seen corresponding path program 114 times [2022-03-20 18:01:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:24,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759107515] [2022-03-20 18:01:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:24,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-20 18:01:24,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:24,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759107515] [2022-03-20 18:01:24,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759107515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:24,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590472593] [2022-03-20 18:01:24,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:24,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:25,000 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) [2022-03-20 18:01:25,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 18:01:25,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:01:25,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:25,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-20 18:01:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:25,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:01:25,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 18:01:25,509 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 22 [2022-03-20 18:01:25,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 18:01:25,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 18:01:25,692 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 22 [2022-03-20 18:01:29,459 INFO L356 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-20 18:01:29,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 64 [2022-03-20 18:01:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 8 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 18:01:29,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 60 proven. 162 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 18:01:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590472593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:32,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 43, 41] total 94 [2022-03-20 18:01:32,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112883058] [2022-03-20 18:01:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112883058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:32,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:32,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:01:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977602809] [2022-03-20 18:01:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:32,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:01:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:01:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=7404, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:01:32,354 INFO L87 Difference]: Start difference. First operand 1233 states and 1409 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:38,854 INFO L93 Difference]: Finished difference Result 1828 states and 2108 transitions. [2022-03-20 18:01:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:01:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 104 [2022-03-20 18:01:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:38,857 INFO L225 Difference]: With dead ends: 1828 [2022-03-20 18:01:38,857 INFO L226 Difference]: Without dead ends: 1823 [2022-03-20 18:01:38,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1598, Invalid=9532, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:01:38,858 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 190 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:38,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 96 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2022-03-20 18:01:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1295. [2022-03-20 18:01:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1290 states have (on average 1.1449612403100775) internal successors, (1477), 1290 states have internal predecessors, (1477), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1481 transitions. [2022-03-20 18:01:42,980 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1481 transitions. Word has length 104 [2022-03-20 18:01:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:42,980 INFO L478 AbstractCegarLoop]: Abstraction has 1295 states and 1481 transitions. [2022-03-20 18:01:42,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1481 transitions. [2022-03-20 18:01:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 18:01:42,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:42,982 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:43,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:43,182 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 [2022-03-20 18:01:43,182 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1582654790, now seen corresponding path program 115 times [2022-03-20 18:01:43,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:43,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614235016] [2022-03-20 18:01:43,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:43,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1582654790, now seen corresponding path program 116 times [2022-03-20 18:01:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065099995] [2022-03-20 18:01:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:43,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-20 18:01:43,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:43,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065099995] [2022-03-20 18:01:43,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065099995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:43,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229287621] [2022-03-20 18:01:43,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:43,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:43,353 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) [2022-03-20 18:01:43,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 18:01:43,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:43,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 18:01:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-20 18:01:44,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-20 18:01:44,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229287621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:44,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:44,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-03-20 18:01:44,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:44,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614235016] [2022-03-20 18:01:44,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614235016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:44,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:44,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:01:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103294778] [2022-03-20 18:01:44,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:44,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:01:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:01:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:01:44,407 INFO L87 Difference]: Start difference. First operand 1295 states and 1481 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:52,930 INFO L93 Difference]: Finished difference Result 2029 states and 2308 transitions. [2022-03-20 18:01:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:01:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-20 18:01:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:52,933 INFO L225 Difference]: With dead ends: 2029 [2022-03-20 18:01:52,933 INFO L226 Difference]: Without dead ends: 2024 [2022-03-20 18:01:52,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:01:52,933 INFO L913 BasicCegarLoop]: 192 mSDtfsCounter, 320 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:52,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 249 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:01:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2022-03-20 18:01:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1524. [2022-03-20 18:01:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1519 states have (on average 1.1441737985516787) internal successors, (1738), 1519 states have internal predecessors, (1738), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 1742 transitions. [2022-03-20 18:01:57,679 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 1742 transitions. Word has length 114 [2022-03-20 18:01:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:57,679 INFO L478 AbstractCegarLoop]: Abstraction has 1524 states and 1742 transitions. [2022-03-20 18:01:57,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 1742 transitions. [2022-03-20 18:01:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 18:01:57,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:57,680 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:57,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:57,880 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 [2022-03-20 18:01:57,881 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 995848776, now seen corresponding path program 117 times [2022-03-20 18:01:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226800913] [2022-03-20 18:01:57,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:57,882 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash 995848776, now seen corresponding path program 118 times [2022-03-20 18:01:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:57,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228325576] [2022-03-20 18:01:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:58,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 18:01:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228325576] [2022-03-20 18:01:58,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228325576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:58,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184568713] [2022-03-20 18:01:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:58,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:58,618 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) [2022-03-20 18:01:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 18:01:58,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:58,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:58,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-20 18:01:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:59,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 18:02:02,412 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-03-20 18:02:02,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 86 treesize of output 34 [2022-03-20 18:02:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 267 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 18:02:02,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 77 proven. 195 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-20 18:02:06,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184568713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:06,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:06,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 48, 35] total 100 [2022-03-20 18:02:06,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226800913] [2022-03-20 18:02:06,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226800913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:06,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:06,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:02:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147624698] [2022-03-20 18:02:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:06,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:02:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:02:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1345, Invalid=8554, Unknown=1, NotChecked=0, Total=9900 [2022-03-20 18:02:06,737 INFO L87 Difference]: Start difference. First operand 1524 states and 1742 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:21,813 INFO L93 Difference]: Finished difference Result 4884 states and 5566 transitions. [2022-03-20 18:02:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:02:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-20 18:02:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:21,818 INFO L225 Difference]: With dead ends: 4884 [2022-03-20 18:02:21,818 INFO L226 Difference]: Without dead ends: 3996 [2022-03-20 18:02:21,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 155 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1870, Invalid=12649, Unknown=1, NotChecked=0, Total=14520 [2022-03-20 18:02:21,820 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:21,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 102 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:02:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2022-03-20 18:02:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 2514. [2022-03-20 18:02:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2514 states, 2509 states have (on average 1.1219609406137903) internal successors, (2815), 2509 states have internal predecessors, (2815), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2514 states to 2514 states and 2819 transitions. [2022-03-20 18:02:29,691 INFO L78 Accepts]: Start accepts. Automaton has 2514 states and 2819 transitions. Word has length 114 [2022-03-20 18:02:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:29,691 INFO L478 AbstractCegarLoop]: Abstraction has 2514 states and 2819 transitions. [2022-03-20 18:02:29,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2514 states and 2819 transitions. [2022-03-20 18:02:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 18:02:29,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:29,693 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:29,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:29,894 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 [2022-03-20 18:02:29,894 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash -222783544, now seen corresponding path program 119 times [2022-03-20 18:02:29,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:29,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536627485] [2022-03-20 18:02:29,895 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:29,896 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash -222783544, now seen corresponding path program 120 times [2022-03-20 18:02:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213134818] [2022-03-20 18:02:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:30,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 82 proven. 175 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 18:02:30,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213134818] [2022-03-20 18:02:30,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213134818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:30,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413927441] [2022-03-20 18:02:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:30,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:30,590 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) [2022-03-20 18:02:30,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 18:02:31,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:02:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 18:02:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:31,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 18:02:31,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-20 18:02:31,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-20 18:02:31,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-20 18:02:31,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-20 18:02:31,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:02:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 92 proven. 185 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-03-20 18:02:32,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 143 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 18:02:33,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413927441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:33,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:33,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 17] total 54 [2022-03-20 18:02:33,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536627485] [2022-03-20 18:02:33,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536627485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:33,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:33,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:02:33,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842880993] [2022-03-20 18:02:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:33,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:02:33,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:02:33,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:02:33,083 INFO L87 Difference]: Start difference. First operand 2514 states and 2819 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 19 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:50,395 INFO L93 Difference]: Finished difference Result 5218 states and 5858 transitions. [2022-03-20 18:02:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:02:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 19 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-20 18:02:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:50,401 INFO L225 Difference]: With dead ends: 5218 [2022-03-20 18:02:50,401 INFO L226 Difference]: Without dead ends: 5051 [2022-03-20 18:02:50,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=609, Invalid=4361, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:02:50,402 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 282 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:50,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 70 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:02:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2022-03-20 18:03:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3777. [2022-03-20 18:03:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3772 states have (on average 1.116118769883351) internal successors, (4210), 3772 states have internal predecessors, (4210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 4214 transitions. [2022-03-20 18:03:01,820 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 4214 transitions. Word has length 114 [2022-03-20 18:03:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:01,820 INFO L478 AbstractCegarLoop]: Abstraction has 3777 states and 4214 transitions. [2022-03-20 18:03:01,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 19 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 4214 transitions. [2022-03-20 18:03:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 18:03:01,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:01,823 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:01,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:02,024 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 [2022-03-20 18:03:02,024 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 844294156, now seen corresponding path program 121 times [2022-03-20 18:03:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019388263] [2022-03-20 18:03:02,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:02,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash 844294156, now seen corresponding path program 122 times [2022-03-20 18:03:02,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:02,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236121675] [2022-03-20 18:03:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:02,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:02,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 227 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-20 18:03:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236121675] [2022-03-20 18:03:02,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236121675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404512475] [2022-03-20 18:03:02,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:03:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:02,728 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) [2022-03-20 18:03:02,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 18:03:02,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:03:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 18:03:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:05,963 INFO L356 Elim1Store]: treesize reduction 59, result has 30.6 percent of original size [2022-03-20 18:03:05,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 48 [2022-03-20 18:03:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 281 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 18:03:06,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:09,160 INFO L356 Elim1Store]: treesize reduction 466, result has 20.9 percent of original size [2022-03-20 18:03:09,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 120 treesize of output 148