/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/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:44:07,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:44:07,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:44:07,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:44:07,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:44:07,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:44:07,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:44:07,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:44:07,938 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:44:07,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:44:07,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:44:07,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:44:07,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:44:07,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:44:07,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:44:07,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:44:07,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:44:07,941 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:44:07,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:44:07,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:07,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:44:07,942 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:44:07,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:44:07,943 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:44:07,943 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:44:08,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:44:08,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:44:08,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:44:08,227 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:44:08,227 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:44:08,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-04-06 19:44:08,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4709738a1/49831244986947a4a463812832fd54f4/FLAG1ee8d7c72 [2022-04-06 19:44:08,704 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:44:08,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-04-06 19:44:08,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4709738a1/49831244986947a4a463812832fd54f4/FLAG1ee8d7c72 [2022-04-06 19:44:09,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4709738a1/49831244986947a4a463812832fd54f4 [2022-04-06 19:44:09,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:44:09,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:44:09,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:09,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:44:09,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:44:09,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13160db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09, skipping insertion in model container [2022-04-06 19:44:09,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:44:09,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:44:09,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2022-04-06 19:44:09,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:09,363 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:44:09,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2022-04-06 19:44:09,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:09,396 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:44:09,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09 WrapperNode [2022-04-06 19:44:09,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:09,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:44:09,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:44:09,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:44:09,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:44:09,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:44:09,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:44:09,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:44:09,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (1/1) ... [2022-04-06 19:44:09,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:09,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:09,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:44:09,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:44:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:44:09,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:44:09,522 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:44:09,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:44:09,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:44:09,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:44:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:44:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:44:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:44:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:44:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:44:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:44:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:44:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:44:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:44:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:44:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:44:09,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:44:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:44:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:44:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:44:09,608 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:44:09,609 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:44:09,783 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:44:09,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:44:09,788 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 19:44:09,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:09 BoogieIcfgContainer [2022-04-06 19:44:09,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:44:09,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:44:09,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:44:09,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:44:09,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:44:09" (1/3) ... [2022-04-06 19:44:09,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b52a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:09, skipping insertion in model container [2022-04-06 19:44:09,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:09" (2/3) ... [2022-04-06 19:44:09,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b52a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:09, skipping insertion in model container [2022-04-06 19:44:09,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:09" (3/3) ... [2022-04-06 19:44:09,818 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2022-04-06 19:44:09,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:44:09,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:44:09,854 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:44:09,860 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:44:09,860 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:44:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:44:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 19:44:09,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:09,882 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:09,882 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 1 times [2022-04-06 19:44:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:09,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228964465] [2022-04-06 19:44:09,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 2 times [2022-04-06 19:44:09,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:09,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859936631] [2022-04-06 19:44:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:09,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:10,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:10,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859936631] [2022-04-06 19:44:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859936631] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:10,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:10,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:10,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:10,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228964465] [2022-04-06 19:44:10,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228964465] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:10,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:10,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118326480] [2022-04-06 19:44:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:10,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:44:10,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:44:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:10,167 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:10,215 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-04-06 19:44:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:44:10,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 19:44:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:10,224 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:44:10,224 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:44:10,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:10,232 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:10,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:44:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 19:44:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 19:44:10,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-04-06 19:44:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:10,273 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 19:44:10,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 19:44:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 19:44:10,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:10,275 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:10,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:44:10,276 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:10,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 1 times [2022-04-06 19:44:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:10,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1895204429] [2022-04-06 19:44:10,279 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 2 times [2022-04-06 19:44:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783097449] [2022-04-06 19:44:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:10,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:10,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:10,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783097449] [2022-04-06 19:44:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783097449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:10,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:10,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:10,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1895204429] [2022-04-06 19:44:10,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1895204429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:10,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:10,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:10,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876077534] [2022-04-06 19:44:10,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:10,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:10,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:10,386 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:10,439 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 19:44:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 19:44:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:10,442 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:44:10,442 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 19:44:10,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:10,447 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:10,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 19:44:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-04-06 19:44:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 19:44:10,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-04-06 19:44:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:10,466 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 19:44:10,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 19:44:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:44:10,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:10,468 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:10,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:44:10,468 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 1 times [2022-04-06 19:44:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149313936] [2022-04-06 19:44:10,479 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:10,480 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 2 times [2022-04-06 19:44:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236432843] [2022-04-06 19:44:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:10,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:44:10,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236432843] [2022-04-06 19:44:10,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236432843] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217831947] [2022-04-06 19:44:10,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:10,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:10,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:44:10,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:10,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:10,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 19:44:10,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:44:10,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:44:10,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217831947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:10,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:10,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 19:44:10,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:10,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149313936] [2022-04-06 19:44:10,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149313936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:10,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:10,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:44:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347955474] [2022-04-06 19:44:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:10,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:44:10,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:44:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:44:10,867 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2022-04-06 19:44:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:10,916 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-04-06 19:44:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:44:10,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 [2022-04-06 19:44:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:10,917 INFO L225 Difference]: With dead ends: 35 [2022-04-06 19:44:10,917 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 19:44:10,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:44:10,919 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:10,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 19:44:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-04-06 19:44:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-04-06 19:44:10,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2022-04-06 19:44:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:10,924 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-04-06 19:44:10,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2022-04-06 19:44:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-06 19:44:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:44:10,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:10,925 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:10,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:44:11,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:11,150 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 3 times [2022-04-06 19:44:11,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:11,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [18072347] [2022-04-06 19:44:11,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:11,154 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:11,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 4 times [2022-04-06 19:44:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:11,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106179479] [2022-04-06 19:44:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:11,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:44:11,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106179479] [2022-04-06 19:44:11,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106179479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:11,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631620821] [2022-04-06 19:44:11,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:11,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:11,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:11,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:11,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:44:11,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:44:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:44:11,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:44:11,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631620821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:11,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:11,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 19:44:11,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:11,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [18072347] [2022-04-06 19:44:11,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [18072347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:11,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:11,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:44:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150713304] [2022-04-06 19:44:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:11,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:44:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:44:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:44:11,538 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-04-06 19:44:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:11,630 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-04-06 19:44:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:44:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 22 [2022-04-06 19:44:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:11,632 INFO L225 Difference]: With dead ends: 41 [2022-04-06 19:44:11,632 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 19:44:11,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:44:11,637 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:11,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 19:44:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-04-06 19:44:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-06 19:44:11,655 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2022-04-06 19:44:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:11,655 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-06 19:44:11,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-04-06 19:44:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-06 19:44:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 19:44:11,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:11,657 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:11,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:11,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:44:11,876 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 5 times [2022-04-06 19:44:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:11,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070279036] [2022-04-06 19:44:11,878 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:11,878 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 6 times [2022-04-06 19:44:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:11,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370926903] [2022-04-06 19:44:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:11,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 19:44:11,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370926903] [2022-04-06 19:44:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370926903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462858883] [2022-04-06 19:44:11,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:11,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:11,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:11,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:44:12,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:44:12,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:44:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 19:44:12,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 19:44:12,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462858883] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:12,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:12,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 19:44:12,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:12,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070279036] [2022-04-06 19:44:12,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070279036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:12,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:12,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:44:12,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776717222] [2022-04-06 19:44:12,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:12,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:44:12,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:44:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:12,172 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:12,268 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-04-06 19:44:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:44:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 19:44:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:12,269 INFO L225 Difference]: With dead ends: 47 [2022-04-06 19:44:12,270 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 19:44:12,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:44:12,271 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:12,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 26 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 19:44:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-04-06 19:44:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-04-06 19:44:12,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-04-06 19:44:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:12,277 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-04-06 19:44:12,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-04-06 19:44:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 19:44:12,277 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:12,278 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:12,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:12,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:12,492 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 7 times [2022-04-06 19:44:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:12,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215563981] [2022-04-06 19:44:12,494 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:12,494 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 8 times [2022-04-06 19:44:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:12,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313516984] [2022-04-06 19:44:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:12,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:44:12,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:12,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313516984] [2022-04-06 19:44:12,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313516984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:12,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253165248] [2022-04-06 19:44:12,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:12,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:12,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:12,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:12,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:44:12,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:12,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:44:12,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:44:12,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253165248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:12,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:12,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:44:12,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:12,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215563981] [2022-04-06 19:44:12,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215563981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:12,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:12,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:44:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979427094] [2022-04-06 19:44:12,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:12,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:44:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:44:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:44:12,819 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:12,928 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-04-06 19:44:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:44:12,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have 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 [2022-04-06 19:44:12,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:12,930 INFO L225 Difference]: With dead ends: 53 [2022-04-06 19:44:12,930 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 19:44:12,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:44:12,932 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:12,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 19:44:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-04-06 19:44:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-04-06 19:44:12,942 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2022-04-06 19:44:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:12,943 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-04-06 19:44:12,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-04-06 19:44:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 19:44:12,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:12,944 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:12,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:13,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:13,168 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 9 times [2022-04-06 19:44:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475941805] [2022-04-06 19:44:13,170 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:13,170 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 10 times [2022-04-06 19:44:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:13,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041716000] [2022-04-06 19:44:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:13,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:44:13,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:13,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041716000] [2022-04-06 19:44:13,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041716000] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:13,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455412863] [2022-04-06 19:44:13,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:13,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:13,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:13,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:13,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:44:13,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:13,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 19:44:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:44:13,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:44:13,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455412863] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:13,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:13,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 19:44:13,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475941805] [2022-04-06 19:44:13,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475941805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:13,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:13,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:44:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73312321] [2022-04-06 19:44:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:13,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:44:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:44:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:44:13,613 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:13,741 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-04-06 19:44:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:44:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 19:44:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:13,742 INFO L225 Difference]: With dead ends: 59 [2022-04-06 19:44:13,742 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 19:44:13,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:44:13,743 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:13,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 19:44:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-04-06 19:44:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-06 19:44:13,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-04-06 19:44:13,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:13,750 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-06 19:44:13,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-06 19:44:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 19:44:13,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:13,751 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:13,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:13,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:13,974 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 11 times [2022-04-06 19:44:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:13,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742170407] [2022-04-06 19:44:13,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:13,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:13,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 12 times [2022-04-06 19:44:13,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:13,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027848270] [2022-04-06 19:44:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:44:14,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:14,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027848270] [2022-04-06 19:44:14,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027848270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:14,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120673226] [2022-04-06 19:44:14,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:14,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:14,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:44:14,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:44:14,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:14,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:44:14,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:44:14,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:44:14,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120673226] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:14,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:14,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 19:44:14,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742170407] [2022-04-06 19:44:14,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742170407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:14,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:14,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:44:14,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841944042] [2022-04-06 19:44:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:14,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:44:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:44:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:44:14,526 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:14,651 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-04-06 19:44:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:44:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 19:44:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:14,654 INFO L225 Difference]: With dead ends: 65 [2022-04-06 19:44:14,654 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 19:44:14,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:44:14,655 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:14,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 19:44:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-04-06 19:44:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-04-06 19:44:14,669 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-04-06 19:44:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:14,669 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-04-06 19:44:14,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-04-06 19:44:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 19:44:14,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:14,670 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:14,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:14,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:14,887 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 13 times [2022-04-06 19:44:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017549428] [2022-04-06 19:44:14,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:14,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 14 times [2022-04-06 19:44:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:14,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896519027] [2022-04-06 19:44:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:14,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 19:44:14,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896519027] [2022-04-06 19:44:14,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896519027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882071939] [2022-04-06 19:44:14,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:14,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:14,992 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:15,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:44:15,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:44:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 19:44:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 19:44:15,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882071939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:15,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:15,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 19:44:15,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017549428] [2022-04-06 19:44:15,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017549428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:15,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:15,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:44:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280711158] [2022-04-06 19:44:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:15,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:44:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:44:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:44:15,318 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:15,494 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-04-06 19:44:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:44:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 [2022-04-06 19:44:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:15,496 INFO L225 Difference]: With dead ends: 71 [2022-04-06 19:44:15,496 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 19:44:15,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:44:15,497 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:15,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 41 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 19:44:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-04-06 19:44:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-04-06 19:44:15,504 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-04-06 19:44:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:15,505 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-04-06 19:44:15,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-04-06 19:44:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 19:44:15,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:15,506 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:15,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:15,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:15,724 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 15 times [2022-04-06 19:44:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:15,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755296815] [2022-04-06 19:44:15,726 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:15,726 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 16 times [2022-04-06 19:44:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:15,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442503016] [2022-04-06 19:44:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:44:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:15,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442503016] [2022-04-06 19:44:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442503016] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523467229] [2022-04-06 19:44:15,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:15,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:44:15,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:44:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:44:16,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:44:16,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523467229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:16,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:16,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 19:44:16,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755296815] [2022-04-06 19:44:16,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755296815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:16,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:16,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:44:16,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164257087] [2022-04-06 19:44:16,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:16,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:44:16,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:44:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:44:16,245 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:16,388 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-04-06 19:44:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:44:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 19:44:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:16,389 INFO L225 Difference]: With dead ends: 77 [2022-04-06 19:44:16,389 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 19:44:16,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:44:16,390 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:16,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 19:44:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-04-06 19:44:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-04-06 19:44:16,397 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-04-06 19:44:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:16,397 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-04-06 19:44:16,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-04-06 19:44:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 19:44:16,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:16,398 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:16,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:16,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:44:16,616 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 17 times [2022-04-06 19:44:16,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217859312] [2022-04-06 19:44:16,618 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:16,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 18 times [2022-04-06 19:44:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:16,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043775602] [2022-04-06 19:44:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:16,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:16,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 19:44:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043775602] [2022-04-06 19:44:16,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043775602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335926542] [2022-04-06 19:44:16,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:16,760 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:16,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:44:17,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:44:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:44:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 19:44:17,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 19:44:17,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335926542] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:17,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:17,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 19:44:17,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:17,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217859312] [2022-04-06 19:44:17,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217859312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:17,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:17,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:44:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135712005] [2022-04-06 19:44:17,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:17,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:44:17,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:44:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:44:17,948 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:18,118 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-04-06 19:44:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:44:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 50 [2022-04-06 19:44:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:18,120 INFO L225 Difference]: With dead ends: 83 [2022-04-06 19:44:18,120 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 19:44:18,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:44:18,121 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:18,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 51 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 19:44:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-04-06 19:44:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-04-06 19:44:18,132 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-04-06 19:44:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:18,134 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-04-06 19:44:18,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-04-06 19:44:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 19:44:18,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:18,138 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:18,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:18,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:18,351 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 19 times [2022-04-06 19:44:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983556065] [2022-04-06 19:44:18,353 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:18,354 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 20 times [2022-04-06 19:44:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:18,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640545418] [2022-04-06 19:44:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 19:44:18,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:18,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640545418] [2022-04-06 19:44:18,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640545418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:18,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284762595] [2022-04-06 19:44:18,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:18,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:18,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:44:18,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:44:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 19:44:18,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 19:44:19,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284762595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:19,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:19,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 19:44:19,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1983556065] [2022-04-06 19:44:19,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1983556065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:19,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:19,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:44:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118039251] [2022-04-06 19:44:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:19,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:44:19,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:44:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:44:19,023 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:19,211 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-04-06 19:44:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:44:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 54 [2022-04-06 19:44:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:19,212 INFO L225 Difference]: With dead ends: 89 [2022-04-06 19:44:19,212 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 19:44:19,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:44:19,213 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:19,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 26 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 19:44:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-04-06 19:44:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-04-06 19:44:19,220 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-04-06 19:44:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:19,221 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-04-06 19:44:19,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-04-06 19:44:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 19:44:19,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:19,221 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:19,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:19,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:44:19,446 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 21 times [2022-04-06 19:44:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:19,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794462561] [2022-04-06 19:44:19,448 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:19,448 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 22 times [2022-04-06 19:44:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062835977] [2022-04-06 19:44:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:19,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:44:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062835977] [2022-04-06 19:44:19,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062835977] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995205856] [2022-04-06 19:44:19,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:19,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:19,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:19,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:44:19,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:19,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:44:19,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:44:19,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:44:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995205856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:20,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:20,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 19:44:20,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794462561] [2022-04-06 19:44:20,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794462561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:20,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:20,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:44:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636977273] [2022-04-06 19:44:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:20,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:44:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:44:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:44:20,115 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:20,315 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-04-06 19:44:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:44:20,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 19:44:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:20,316 INFO L225 Difference]: With dead ends: 95 [2022-04-06 19:44:20,316 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 19:44:20,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:44:20,319 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:20,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 31 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 19:44:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-04-06 19:44:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-04-06 19:44:20,338 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-04-06 19:44:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:20,339 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-04-06 19:44:20,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-04-06 19:44:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 19:44:20,340 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:20,340 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:20,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:20,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:44:20,555 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 23 times [2022-04-06 19:44:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:20,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [42645842] [2022-04-06 19:44:20,557 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:20,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 24 times [2022-04-06 19:44:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:20,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542603524] [2022-04-06 19:44:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:20,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:44:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542603524] [2022-04-06 19:44:20,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542603524] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871702321] [2022-04-06 19:44:20,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:20,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:20,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:20,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:20,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:44:23,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 19:44:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:44:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:44:23,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:44:24,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871702321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:24,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:24,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 31 [2022-04-06 19:44:24,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [42645842] [2022-04-06 19:44:24,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [42645842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:24,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:24,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:44:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299653035] [2022-04-06 19:44:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:24,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:44:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:44:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:44:24,144 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:24,352 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-04-06 19:44:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:44:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 62 [2022-04-06 19:44:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:24,355 INFO L225 Difference]: With dead ends: 101 [2022-04-06 19:44:24,355 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 19:44:24,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:44:24,358 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:24,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 21 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 19:44:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-04-06 19:44:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-04-06 19:44:24,374 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-04-06 19:44:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:24,374 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-04-06 19:44:24,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-04-06 19:44:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 19:44:24,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:24,375 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:24,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:24,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:44:24,599 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 25 times [2022-04-06 19:44:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:24,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838119899] [2022-04-06 19:44:24,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:24,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 26 times [2022-04-06 19:44:24,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683035822] [2022-04-06 19:44:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:24,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 19:44:24,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683035822] [2022-04-06 19:44:24,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683035822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890634761] [2022-04-06 19:44:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:24,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:24,758 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:24,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:44:24,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:24,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:24,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:44:24,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 19:44:24,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 19:44:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890634761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:25,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:25,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 19:44:25,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:25,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838119899] [2022-04-06 19:44:25,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838119899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:25,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:25,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:44:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387380892] [2022-04-06 19:44:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:25,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:44:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:44:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:44:25,297 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:25,526 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-04-06 19:44:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:44:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 66 [2022-04-06 19:44:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:25,527 INFO L225 Difference]: With dead ends: 107 [2022-04-06 19:44:25,527 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 19:44:25,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:44:25,531 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:25,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 26 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 19:44:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-04-06 19:44:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-04-06 19:44:25,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-04-06 19:44:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:25,546 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-04-06 19:44:25,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-04-06 19:44:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 19:44:25,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:25,547 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:25,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:25,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:44:25,761 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 27 times [2022-04-06 19:44:25,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:25,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419428225] [2022-04-06 19:44:25,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:25,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 28 times [2022-04-06 19:44:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097429850] [2022-04-06 19:44:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:25,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:26,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 19:44:26,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:26,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097429850] [2022-04-06 19:44:26,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097429850] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:26,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946838163] [2022-04-06 19:44:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:26,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:26,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:26,011 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:26,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:44:26,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:26,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 19:44:26,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 19:44:26,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 19:44:26,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946838163] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:26,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:26,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 19:44:26,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:26,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419428225] [2022-04-06 19:44:26,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419428225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:26,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:26,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:44:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721651575] [2022-04-06 19:44:26,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:26,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:44:26,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:44:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:44:26,664 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:26,899 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-04-06 19:44:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:44:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 70 [2022-04-06 19:44:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:26,899 INFO L225 Difference]: With dead ends: 113 [2022-04-06 19:44:26,899 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 19:44:26,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:44:26,901 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:26,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 36 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 19:44:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-06 19:44:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-04-06 19:44:26,909 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2022-04-06 19:44:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:26,909 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-04-06 19:44:26,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-04-06 19:44:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 19:44:26,910 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:26,910 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:26,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 19:44:27,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:27,119 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 29 times [2022-04-06 19:44:27,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:27,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898990053] [2022-04-06 19:44:27,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:27,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 30 times [2022-04-06 19:44:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:27,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841545815] [2022-04-06 19:44:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:27,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 19:44:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841545815] [2022-04-06 19:44:27,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841545815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629465081] [2022-04-06 19:44:27,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:27,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:27,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:27,316 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:27,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:44:47,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 19:44:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:44:47,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 19:44:47,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 19:44:47,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629465081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:47,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:47,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 19:44:47,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:47,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898990053] [2022-04-06 19:44:47,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898990053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:47,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:47,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:44:47,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884414024] [2022-04-06 19:44:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:47,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:44:47,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:47,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:44:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:44:47,736 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:47,994 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-04-06 19:44:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:44:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 74 [2022-04-06 19:44:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:47,995 INFO L225 Difference]: With dead ends: 119 [2022-04-06 19:44:47,995 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 19:44:47,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:44:47,996 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:47,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 36 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 19:44:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-04-06 19:44:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-04-06 19:44:48,005 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-04-06 19:44:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:48,005 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-04-06 19:44:48,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-04-06 19:44:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 19:44:48,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:48,006 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:48,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:48,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:44:48,207 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:48,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:48,207 INFO L85 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 31 times [2022-04-06 19:44:48,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:48,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863176789] [2022-04-06 19:44:48,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:48,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 32 times [2022-04-06 19:44:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:48,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223793160] [2022-04-06 19:44:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:48,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:48,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 19:44:48,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223793160] [2022-04-06 19:44:48,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223793160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152283174] [2022-04-06 19:44:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:48,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:48,451 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:48,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:44:48,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 19:44:48,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 19:44:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 19:44:49,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152283174] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:49,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:49,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 19:44:49,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863176789] [2022-04-06 19:44:49,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863176789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:44:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447004818] [2022-04-06 19:44:49,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:49,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:44:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:44:49,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:44:49,265 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:49,564 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-04-06 19:44:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:44:49,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 78 [2022-04-06 19:44:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:49,565 INFO L225 Difference]: With dead ends: 125 [2022-04-06 19:44:49,565 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 19:44:49,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:44:49,566 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:49,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 31 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 19:44:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-04-06 19:44:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-04-06 19:44:49,573 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2022-04-06 19:44:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:49,573 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-04-06 19:44:49,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-04-06 19:44:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 19:44:49,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:49,574 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:49,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 19:44:49,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:44:49,774 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 33 times [2022-04-06 19:44:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545006360] [2022-04-06 19:44:49,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:49,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 34 times [2022-04-06 19:44:49,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:49,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435927151] [2022-04-06 19:44:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:49,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:44:50,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:50,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435927151] [2022-04-06 19:44:50,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435927151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:50,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155725071] [2022-04-06 19:44:50,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:50,002 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:50,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:44:50,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:44:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:44:50,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:44:50,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155725071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:50,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:50,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 19:44:50,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545006360] [2022-04-06 19:44:50,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545006360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:50,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:50,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:44:50,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133047320] [2022-04-06 19:44:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:50,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:44:50,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:44:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:44:50,791 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:51,125 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-04-06 19:44:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:44:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 82 [2022-04-06 19:44:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:51,127 INFO L225 Difference]: With dead ends: 131 [2022-04-06 19:44:51,127 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 19:44:51,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:44:51,128 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:51,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 26 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 19:44:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-04-06 19:44:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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) [2022-04-06 19:44:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-04-06 19:44:51,139 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2022-04-06 19:44:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:51,139 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-04-06 19:44:51,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-04-06 19:44:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 19:44:51,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:51,140 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:51,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:51,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:51,344 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 35 times [2022-04-06 19:44:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1237093878] [2022-04-06 19:44:51,346 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:51,346 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 36 times [2022-04-06 19:44:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496910109] [2022-04-06 19:44:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 19:44:51,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496910109] [2022-04-06 19:44:51,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496910109] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884302783] [2022-04-06 19:44:51,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:51,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:51,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:51,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:51,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:45:26,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 19:45:26,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 19:45:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 19:45:26,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 19:45:26,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884302783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:26,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:26,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 19:45:26,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1237093878] [2022-04-06 19:45:26,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1237093878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:26,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:26,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:45:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284448101] [2022-04-06 19:45:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:26,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:45:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:45:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:45:26,939 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:27,261 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-04-06 19:45:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:45:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 86 [2022-04-06 19:45:27,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:27,262 INFO L225 Difference]: With dead ends: 137 [2022-04-06 19:45:27,262 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 19:45:27,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:45:27,264 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:27,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 36 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 19:45:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-04-06 19:45:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-04-06 19:45:27,275 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-04-06 19:45:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:27,275 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-04-06 19:45:27,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-04-06 19:45:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 19:45:27,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:27,276 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:27,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:27,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:27,479 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 37 times [2022-04-06 19:45:27,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850800738] [2022-04-06 19:45:27,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:27,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 38 times [2022-04-06 19:45:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501720289] [2022-04-06 19:45:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:27,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 19:45:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501720289] [2022-04-06 19:45:27,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501720289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366940225] [2022-04-06 19:45:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:27,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:27,741 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:27,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:45:28,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:28,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:45:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 19:45:28,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 19:45:28,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366940225] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:28,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:28,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 19:45:28,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850800738] [2022-04-06 19:45:28,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850800738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:28,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:28,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:45:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068892575] [2022-04-06 19:45:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:28,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:45:28,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:45:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:45:28,685 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2022-04-06 19:45:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:29,026 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-04-06 19:45:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:45:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 90 [2022-04-06 19:45:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:29,027 INFO L225 Difference]: With dead ends: 143 [2022-04-06 19:45:29,027 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 19:45:29,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:45:29,029 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:29,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 19:45:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-04-06 19:45:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-04-06 19:45:29,041 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2022-04-06 19:45:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:29,041 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-04-06 19:45:29,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2022-04-06 19:45:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-04-06 19:45:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 19:45:29,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:29,042 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:29,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:29,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:29,256 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 39 times [2022-04-06 19:45:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466018229] [2022-04-06 19:45:29,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:29,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 40 times [2022-04-06 19:45:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909878199] [2022-04-06 19:45:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 19:45:29,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909878199] [2022-04-06 19:45:29,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909878199] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259422704] [2022-04-06 19:45:29,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:29,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:29,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:29,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:45:29,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 19:45:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 19:45:29,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 19:45:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259422704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:30,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:30,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 19:45:30,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:30,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466018229] [2022-04-06 19:45:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466018229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:30,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:30,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:45:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710729853] [2022-04-06 19:45:30,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:30,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:45:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:45:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:45:30,480 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:30,883 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-04-06 19:45:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:45:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 94 [2022-04-06 19:45:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:30,885 INFO L225 Difference]: With dead ends: 149 [2022-04-06 19:45:30,885 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 19:45:30,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 19:45:30,888 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:30,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 36 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:45:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 19:45:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 19:45:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-04-06 19:45:30,898 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-04-06 19:45:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:30,898 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-04-06 19:45:30,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-04-06 19:45:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 19:45:30,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:30,899 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:30,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:31,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 19:45:31,100 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 41 times [2022-04-06 19:45:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:31,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [160990531] [2022-04-06 19:45:31,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:31,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 42 times [2022-04-06 19:45:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:31,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584711299] [2022-04-06 19:45:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:31,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 19:45:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584711299] [2022-04-06 19:45:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584711299] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746184807] [2022-04-06 19:45:31,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:31,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:31,395 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:31,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:47:21,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 19:47:21,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:47:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 19:47:22,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 19:47:22,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746184807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:22,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:22,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 19:47:22,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:22,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [160990531] [2022-04-06 19:47:22,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [160990531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:22,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:22,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:47:22,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155942965] [2022-04-06 19:47:22,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:22,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:47:22,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:22,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:47:22,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:47:22,738 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:23,139 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-04-06 19:47:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:47:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 98 [2022-04-06 19:47:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:23,140 INFO L225 Difference]: With dead ends: 155 [2022-04-06 19:47:23,140 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 19:47:23,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:47:23,141 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:23,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 31 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 19:47:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-04-06 19:47:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-04-06 19:47:23,154 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-04-06 19:47:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:23,155 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-04-06 19:47:23,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-04-06 19:47:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:47:23,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:23,156 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:23,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:23,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 19:47:23,360 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:23,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 43 times [2022-04-06 19:47:23,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:23,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [433912110] [2022-04-06 19:47:23,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:23,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 44 times [2022-04-06 19:47:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:23,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081409288] [2022-04-06 19:47:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:23,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:23,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 19:47:23,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081409288] [2022-04-06 19:47:23,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081409288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004489595] [2022-04-06 19:47:23,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:23,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:23,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:23,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:23,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:47:23,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:23,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:23,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 19:47:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 19:47:24,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 19:47:24,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004489595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:24,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:24,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 19:47:24,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:24,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [433912110] [2022-04-06 19:47:24,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [433912110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:24,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:24,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:47:24,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063360831] [2022-04-06 19:47:24,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:24,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:47:24,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:47:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:47:24,773 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:25,242 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-04-06 19:47:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 19:47:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-04-06 19:47:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:25,243 INFO L225 Difference]: With dead ends: 161 [2022-04-06 19:47:25,243 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 19:47:25,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:47:25,245 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:25,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 36 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:47:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 19:47:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-04-06 19:47:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-04-06 19:47:25,254 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-04-06 19:47:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:25,255 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-04-06 19:47:25,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-04-06 19:47:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 19:47:25,255 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:25,255 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:25,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:25,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:25,456 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 45 times [2022-04-06 19:47:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:25,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527396711] [2022-04-06 19:47:25,458 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:25,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 46 times [2022-04-06 19:47:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:25,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24044279] [2022-04-06 19:47:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:25,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 19:47:25,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24044279] [2022-04-06 19:47:25,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24044279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393524583] [2022-04-06 19:47:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:25,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:25,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:25,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:25,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:47:26,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:26,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:47:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 19:47:26,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 19:47:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393524583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:26,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:26,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 19:47:26,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:26,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527396711] [2022-04-06 19:47:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527396711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:26,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:26,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:47:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256530234] [2022-04-06 19:47:26,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:26,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:47:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:47:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:47:26,913 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:27,358 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-04-06 19:47:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:47:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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 106 [2022-04-06 19:47:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:27,359 INFO L225 Difference]: With dead ends: 167 [2022-04-06 19:47:27,359 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 19:47:27,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:47:27,360 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:27,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 46 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:47:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 19:47:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-04-06 19:47:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-04-06 19:47:27,375 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2022-04-06 19:47:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:27,375 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-04-06 19:47:27,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-04-06 19:47:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 19:47:27,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:27,376 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:27,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 19:47:27,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:27,577 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 47 times [2022-04-06 19:47:27,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:27,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029548294] [2022-04-06 19:47:27,578 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:27,578 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 48 times [2022-04-06 19:47:27,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:27,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423291534] [2022-04-06 19:47:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:27,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 19:47:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423291534] [2022-04-06 19:47:27,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423291534] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527716063] [2022-04-06 19:47:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:27,936 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:27,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:49:59,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 19:49:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 19:50:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 19:50:00,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 19:50:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527716063] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:00,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:00,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 19:50:00,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:00,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029548294] [2022-04-06 19:50:00,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029548294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:00,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:00,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 19:50:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612141889] [2022-04-06 19:50:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:00,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 19:50:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 19:50:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:50:00,928 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:01,410 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-04-06 19:50:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:50:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 110 [2022-04-06 19:50:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:01,411 INFO L225 Difference]: With dead ends: 173 [2022-04-06 19:50:01,411 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 19:50:01,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:50:01,413 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:01,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 36 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:50:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 19:50:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-04-06 19:50:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-04-06 19:50:01,426 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-04-06 19:50:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:01,426 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-04-06 19:50:01,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-04-06 19:50:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 19:50:01,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:01,428 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:01,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:01,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:50:01,643 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 49 times [2022-04-06 19:50:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:01,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [278565469] [2022-04-06 19:50:01,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:01,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 50 times [2022-04-06 19:50:01,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808048086] [2022-04-06 19:50:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:01,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 19:50:01,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:01,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808048086] [2022-04-06 19:50:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808048086] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916060201] [2022-04-06 19:50:01,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:01,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:01,999 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:01,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:50:02,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:02,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:02,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:50:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 19:50:02,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 19:50:03,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916060201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:03,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:03,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 19:50:03,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:03,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [278565469] [2022-04-06 19:50:03,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [278565469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:03,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:03,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:50:03,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511511828] [2022-04-06 19:50:03,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:03,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:50:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:50:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:50:03,287 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:03,830 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-04-06 19:50:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:50:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 114 [2022-04-06 19:50:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:03,831 INFO L225 Difference]: With dead ends: 179 [2022-04-06 19:50:03,831 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 19:50:03,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:50:03,833 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 213 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:03,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 21 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:50:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 19:50:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-04-06 19:50:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-04-06 19:50:03,849 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-04-06 19:50:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:03,850 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-04-06 19:50:03,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-04-06 19:50:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 19:50:03,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:03,851 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:03,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:04,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:50:04,069 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 51 times [2022-04-06 19:50:04,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:04,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029807494] [2022-04-06 19:50:04,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:04,072 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 52 times [2022-04-06 19:50:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:04,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028640609] [2022-04-06 19:50:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:04,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:04,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 19:50:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028640609] [2022-04-06 19:50:04,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028640609] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9896583] [2022-04-06 19:50:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:04,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:04,491 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:04,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:50:04,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:04,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:04,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 19:50:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 19:50:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 19:50:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9896583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:05,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:05,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 19:50:05,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:05,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029807494] [2022-04-06 19:50:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029807494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:05,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:05,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 19:50:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19733194] [2022-04-06 19:50:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:05,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 19:50:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 19:50:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:50:05,944 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-04-06 19:50:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:06,498 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-04-06 19:50:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:50:06,498 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 118 [2022-04-06 19:50:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:06,499 INFO L225 Difference]: With dead ends: 185 [2022-04-06 19:50:06,499 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 19:50:06,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 19:50:06,500 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:06,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 36 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:50:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 19:50:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-04-06 19:50:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-04-06 19:50:06,514 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2022-04-06 19:50:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:06,514 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-04-06 19:50:06,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-04-06 19:50:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-04-06 19:50:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 19:50:06,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:06,515 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:06,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:06,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:50:06,716 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 53 times [2022-04-06 19:50:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:06,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2053047442] [2022-04-06 19:50:06,717 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:06,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 54 times [2022-04-06 19:50:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:06,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018417643] [2022-04-06 19:50:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:06,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 19:50:07,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018417643] [2022-04-06 19:50:07,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018417643] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266497391] [2022-04-06 19:50:07,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:07,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:07,150 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:07,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:55:57,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 19:55:57,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:55:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 19:55:57,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 19:55:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266497391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:58,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:58,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 19:55:58,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2053047442] [2022-04-06 19:55:58,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2053047442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:58,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:58,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:55:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751620752] [2022-04-06 19:55:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:58,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:55:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:55:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:55:58,675 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:59,234 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-04-06 19:55:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:55:59,234 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 122 [2022-04-06 19:55:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:59,235 INFO L225 Difference]: With dead ends: 191 [2022-04-06 19:55:59,235 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 19:55:59,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 19:55:59,237 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:59,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 41 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:55:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 19:55:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-04-06 19:55:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-04-06 19:55:59,254 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-04-06 19:55:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:59,255 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-04-06 19:55:59,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-04-06 19:55:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-06 19:55:59,255 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:59,256 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:59,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 19:55:59,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:55:59,463 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 55 times [2022-04-06 19:55:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231827848] [2022-04-06 19:55:59,466 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:55:59,466 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 56 times [2022-04-06 19:55:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:59,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221293022] [2022-04-06 19:55:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:59,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 19:55:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221293022] [2022-04-06 19:55:59,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221293022] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596926912] [2022-04-06 19:55:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:55:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:59,934 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:55:59,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:56:00,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:56:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:00,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 19:56:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 19:56:00,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 19:56:01,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596926912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:01,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:01,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 19:56:01,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:01,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231827848] [2022-04-06 19:56:01,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231827848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:01,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:01,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 19:56:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904876409] [2022-04-06 19:56:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:01,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 19:56:01,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 19:56:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:56:01,503 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:02,098 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-04-06 19:56:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 19:56:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-04-06 19:56:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:02,099 INFO L225 Difference]: With dead ends: 197 [2022-04-06 19:56:02,099 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 19:56:02,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 19:56:02,100 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:02,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 36 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:56:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 19:56:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-04-06 19:56:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-04-06 19:56:02,120 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2022-04-06 19:56:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:02,121 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-04-06 19:56:02,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-04-06 19:56:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 19:56:02,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:02,122 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:02,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:02,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:02,347 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 57 times [2022-04-06 19:56:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:02,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811496028] [2022-04-06 19:56:02,349 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:56:02,349 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 58 times [2022-04-06 19:56:02,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:02,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800607666] [2022-04-06 19:56:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:02,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 19:56:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800607666] [2022-04-06 19:56:02,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800607666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633091643] [2022-04-06 19:56:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:56:02,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:02,777 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:02,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:56:03,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:56:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:56:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 19:56:03,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 19:56:04,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633091643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:04,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:04,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 19:56:04,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811496028] [2022-04-06 19:56:04,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811496028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:04,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:04,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:56:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609275063] [2022-04-06 19:56:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:04,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:56:04,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:56:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:56:04,436 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:05,062 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2022-04-06 19:56:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:56:05,062 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-04-06 19:56:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:05,063 INFO L225 Difference]: With dead ends: 203 [2022-04-06 19:56:05,063 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 19:56:05,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 19:56:05,064 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:05,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 41 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:56:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 19:56:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-06 19:56:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-04-06 19:56:05,080 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2022-04-06 19:56:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:05,080 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-04-06 19:56:05,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-04-06 19:56:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 19:56:05,081 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:05,081 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:05,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:05,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:05,299 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 59 times [2022-04-06 19:56:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:05,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191495037] [2022-04-06 19:56:05,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:56:05,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 60 times [2022-04-06 19:56:05,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:05,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096199385] [2022-04-06 19:56:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:05,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:05,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-04-06 19:56:05,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:05,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096199385] [2022-04-06 19:56:05,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096199385] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:05,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803052335] [2022-04-06 19:56:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:56:05,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:05,748 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:05,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process