/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-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:25:12,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:25:12,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:25:12,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:25:12,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:25:12,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:25:12,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:25:12,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:25:12,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:25:12,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:25:12,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:25:12,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:25:12,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:25:12,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:25:12,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:25:12,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:25:12,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:25:12,709 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:25:12,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:25:12,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:25:12,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:25:12,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:25:12,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:25:12,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:25:12,710 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:25:12,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:25:12,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:25:12,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:25:12,916 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:25:12,917 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:25:12,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-20 18:25:12,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7140ba166/d20375b71bbb408aaf018a0a92e9b95d/FLAG2e0507517 [2022-03-20 18:25:13,321 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:25:13,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-20 18:25:13,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7140ba166/d20375b71bbb408aaf018a0a92e9b95d/FLAG2e0507517 [2022-03-20 18:25:13,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7140ba166/d20375b71bbb408aaf018a0a92e9b95d [2022-03-20 18:25:13,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:25:13,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:25:13,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:25:13,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:25:13,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:25:13,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118d4dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13, skipping insertion in model container [2022-03-20 18:25:13,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:25:13,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:25:13,486 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-lit/mcmillan2006.i[1009,1022] [2022-03-20 18:25:13,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:25:13,526 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:25:13,536 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-lit/mcmillan2006.i[1009,1022] [2022-03-20 18:25:13,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:25:13,552 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:25:13,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13 WrapperNode [2022-03-20 18:25:13,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:25:13,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:25:13,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:25:13,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:25:13,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:25:13,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:25:13,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:25:13,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:25:13,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (1/1) ... [2022-03-20 18:25:13,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:25:13,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:13,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:25:13,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:25:13,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:25:13,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:25:13,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:25:13,671 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:25:13,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:25:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:25:13,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:25:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:25:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:25:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:25:13,738 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:25:13,739 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:25:13,844 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:25:13,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:25:13,848 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 18:25:13,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:25:13 BoogieIcfgContainer [2022-03-20 18:25:13,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:25:13,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:25:13,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:25:13,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:25:13,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:25:13" (1/3) ... [2022-03-20 18:25:13,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc02196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:25:13, skipping insertion in model container [2022-03-20 18:25:13,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:25:13" (2/3) ... [2022-03-20 18:25:13,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc02196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:25:13, skipping insertion in model container [2022-03-20 18:25:13,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:25:13" (3/3) ... [2022-03-20 18:25:13,863 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-03-20 18:25:13,866 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:25:13,866 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:25:13,917 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:25:13,926 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:25:13,926 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:25:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 18:25:13,955 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:13,956 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:13,956 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 1 times [2022-03-20 18:25:13,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:13,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024922241] [2022-03-20 18:25:13,973 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:25:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 2 times [2022-03-20 18:25:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:13,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554662619] [2022-03-20 18:25:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:14,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:14,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:14,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554662619] [2022-03-20 18:25:14,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554662619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:14,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:14,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:25:14,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024922241] [2022-03-20 18:25:14,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024922241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:14,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:14,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:25:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600427598] [2022-03-20 18:25:14,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:14,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:25:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:25:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:25:14,202 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-03-20 18:25:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:14,340 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-03-20 18:25:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 18:25:14,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-03-20 18:25:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:14,346 INFO L225 Difference]: With dead ends: 48 [2022-03-20 18:25:14,347 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 18:25:14,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:25:14,352 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:14,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 18:25:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 18:25:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-20 18:25:14,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-20 18:25:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:14,382 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-20 18:25:14,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-03-20 18:25:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-20 18:25:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 18:25:14,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:14,384 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:14,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:25:14,384 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 1 times [2022-03-20 18:25:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:14,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860037964] [2022-03-20 18:25:14,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:14,392 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 2 times [2022-03-20 18:25:14,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163871309] [2022-03-20 18:25:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:14,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:14,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163871309] [2022-03-20 18:25:14,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163871309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:14,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156897006] [2022-03-20 18:25:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:14,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:14,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:14,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:25:14,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 18:25:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:14,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-20 18:25:14,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 18:25:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:14,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:14,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-20 18:25:14,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-03-20 18:25:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156897006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:14,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:14,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-20 18:25:14,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860037964] [2022-03-20 18:25:14,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860037964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:14,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:14,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:25:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070937329] [2022-03-20 18:25:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:14,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:25:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:14,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:25:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:25:14,918 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:15,061 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-20 18:25:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:25:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 18:25:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:15,062 INFO L225 Difference]: With dead ends: 32 [2022-03-20 18:25:15,062 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 18:25:15,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:25:15,063 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:15,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 18:25:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-20 18:25:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-20 18:25:15,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-20 18:25:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:15,068 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-20 18:25:15,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-20 18:25:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 18:25:15,069 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:15,069 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:15,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:15,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:15,280 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 1 times [2022-03-20 18:25:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873530711] [2022-03-20 18:25:15,281 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:15,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 2 times [2022-03-20 18:25:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574442950] [2022-03-20 18:25:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 18:25:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:15,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574442950] [2022-03-20 18:25:15,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574442950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:15,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652830127] [2022-03-20 18:25:15,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:15,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:15,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:25:15,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:15,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:25:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652830127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:15,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:15,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 18:25:15,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873530711] [2022-03-20 18:25:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873530711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:15,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:15,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:25:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852388254] [2022-03-20 18:25:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:15,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:25:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:25:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:25:15,600 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:15,693 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-20 18:25:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:25:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-20 18:25:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:15,695 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:25:15,695 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 18:25:15,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:25:15,696 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:15,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:25:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 18:25:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 18:25:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-20 18:25:15,703 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-20 18:25:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:15,703 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-20 18:25:15,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-20 18:25:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 18:25:15,704 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:15,704 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:15,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:15,907 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,SelfDestructingSolverStorable2 [2022-03-20 18:25:15,907 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 3 times [2022-03-20 18:25:15,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:15,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223522143] [2022-03-20 18:25:15,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:15,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 4 times [2022-03-20 18:25:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171403566] [2022-03-20 18:25:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:15,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:16,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 18:25:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:16,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:16,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171403566] [2022-03-20 18:25:16,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171403566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:16,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36496709] [2022-03-20 18:25:16,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:25:16,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:16,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:16,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:16,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:25:16,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:25:16,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 18:25:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:16,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:16,465 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:16,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:16,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:16,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36496709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:16,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:16,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-03-20 18:25:16,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:16,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223522143] [2022-03-20 18:25:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223522143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:16,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:16,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:25:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754186673] [2022-03-20 18:25:16,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:16,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:25:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:25:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:25:16,602 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:16,827 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-03-20 18:25:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:25:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-03-20 18:25:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:16,828 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:25:16,828 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 18:25:16,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:25:16,830 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:16,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 18:25:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-03-20 18:25:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:25:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-20 18:25:16,835 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-03-20 18:25:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:16,835 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-20 18:25:16,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-20 18:25:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 18:25:16,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:16,836 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:16,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:17,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:17,047 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 5 times [2022-03-20 18:25:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:17,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1030618628] [2022-03-20 18:25:17,049 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:17,049 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 6 times [2022-03-20 18:25:17,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:17,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937591068] [2022-03-20 18:25:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:17,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 18:25:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 18:25:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:25:17,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:17,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937591068] [2022-03-20 18:25:17,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937591068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:17,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928084178] [2022-03-20 18:25:17,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:25:17,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:17,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:17,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:25:17,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 18:25:17,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 18:25:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:25:17,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:25:17,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928084178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:17,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:17,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-20 18:25:17,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:17,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1030618628] [2022-03-20 18:25:17,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1030618628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:17,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:17,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:25:17,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581871018] [2022-03-20 18:25:17,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:17,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:25:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:25:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:25:17,363 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:17,501 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-20 18:25:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:25:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-03-20 18:25:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:17,502 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:25:17,502 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 18:25:17,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:25:17,503 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:17,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:17,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 18:25:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 18:25:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:25:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-20 18:25:17,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-20 18:25:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:17,510 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-20 18:25:17,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-20 18:25:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 18:25:17,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:17,511 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:17,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:17,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:17,717 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:17,717 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 7 times [2022-03-20 18:25:17,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480375794] [2022-03-20 18:25:17,718 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:17,718 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 8 times [2022-03-20 18:25:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:17,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953814907] [2022-03-20 18:25:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 18:25:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 18:25:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:25:17,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:17,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953814907] [2022-03-20 18:25:17,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953814907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:17,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351006634] [2022-03-20 18:25:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:17,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:17,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:17,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:25:17,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 18:25:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:17,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:18,404 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:18,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:25:18,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351006634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:18,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:18,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-20 18:25:18,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480375794] [2022-03-20 18:25:18,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480375794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:18,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:18,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:25:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136219374] [2022-03-20 18:25:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:18,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:25:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:25:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:25:18,527 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:18,813 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-03-20 18:25:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:25:18,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-03-20 18:25:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:18,814 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:25:18,815 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:25:18,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:25:18,816 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:18,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 65 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:25:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-20 18:25:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:25:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-20 18:25:18,822 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-03-20 18:25:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:18,822 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-20 18:25:18,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:25:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-20 18:25:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 18:25:18,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:18,823 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:18,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:19,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:19,040 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:19,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 9 times [2022-03-20 18:25:19,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:19,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [660411047] [2022-03-20 18:25:19,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:19,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 10 times [2022-03-20 18:25:19,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:19,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083392075] [2022-03-20 18:25:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:19,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 18:25:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 18:25:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:25:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 18:25:19,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:19,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083392075] [2022-03-20 18:25:19,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083392075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:19,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980939365] [2022-03-20 18:25:19,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:25:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:19,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:19,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:25:19,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:25:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:19,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 18:25:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 18:25:19,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 18:25:19,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980939365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:19,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:19,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-03-20 18:25:19,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [660411047] [2022-03-20 18:25:19,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [660411047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:19,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:19,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:25:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732061351] [2022-03-20 18:25:19,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:19,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:25:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:25:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:25:19,380 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), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:25:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:19,546 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-03-20 18:25:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:25:19,546 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), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-03-20 18:25:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:19,547 INFO L225 Difference]: With dead ends: 74 [2022-03-20 18:25:19,547 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:25:19,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:25:19,548 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:19,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:25:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 18:25:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:25:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-20 18:25:19,554 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-03-20 18:25:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:19,554 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-20 18:25:19,554 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), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:25:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-20 18:25:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 18:25:19,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:19,555 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:19,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:19,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:19,756 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 11 times [2022-03-20 18:25:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439589295] [2022-03-20 18:25:19,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:19,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 12 times [2022-03-20 18:25:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:19,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693706961] [2022-03-20 18:25:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:19,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 18:25:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 18:25:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 18:25:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 18:25:19,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693706961] [2022-03-20 18:25:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693706961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739490671] [2022-03-20 18:25:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:25:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:19,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:19,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:25:19,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:25:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 18:25:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:20,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:20,649 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:20,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 18:25:20,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:20,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739490671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:20,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:20,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-03-20 18:25:20,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439589295] [2022-03-20 18:25:20,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439589295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:20,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:20,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:25:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269715748] [2022-03-20 18:25:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:20,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:25:20,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:25:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:25:20,786 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:25:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:21,190 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-03-20 18:25:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:25:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-03-20 18:25:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:21,193 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:25:21,193 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 18:25:21,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:25:21,194 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:21,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 80 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:25:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 18:25:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-20 18:25:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:25:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-20 18:25:21,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2022-03-20 18:25:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:21,209 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-20 18:25:21,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:25:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-20 18:25:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 18:25:21,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:21,212 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:21,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:21,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:21,422 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 13 times [2022-03-20 18:25:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:21,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406855091] [2022-03-20 18:25:21,423 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:21,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:21,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 14 times [2022-03-20 18:25:21,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:21,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512294473] [2022-03-20 18:25:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:21,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:21,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:21,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 18:25:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 18:25:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:21,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 18:25:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:21,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:25:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 18:25:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512294473] [2022-03-20 18:25:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512294473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866026379] [2022-03-20 18:25:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:21,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:21,529 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:21,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:25:21,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:21,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 18:25:21,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 18:25:21,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 18:25:21,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866026379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:21,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:21,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-20 18:25:21,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:21,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406855091] [2022-03-20 18:25:21,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406855091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:21,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:21,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:25:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11227481] [2022-03-20 18:25:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:21,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:25:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:25:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:25:21,819 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:25:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:22,018 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-20 18:25:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:25:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2022-03-20 18:25:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:22,021 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:25:22,021 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 18:25:22,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:25:22,022 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:22,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 18:25:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 18:25:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:25:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-20 18:25:22,030 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-03-20 18:25:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:22,030 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-20 18:25:22,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:25:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-20 18:25:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 18:25:22,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:22,031 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:22,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:22,235 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,SelfDestructingSolverStorable8 [2022-03-20 18:25:22,235 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 15 times [2022-03-20 18:25:22,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452273091] [2022-03-20 18:25:22,237 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:22,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 16 times [2022-03-20 18:25:22,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:22,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109232671] [2022-03-20 18:25:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:22,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:22,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:22,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 18:25:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 18:25:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:22,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 18:25:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:22,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:25:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 18:25:22,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:22,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109232671] [2022-03-20 18:25:22,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109232671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:22,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90408794] [2022-03-20 18:25:22,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:25:22,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:22,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:22,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:22,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:25:22,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:25:22,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:22,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 18:25:22,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:22,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:23,270 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:23,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 18:25:23,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:23,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90408794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:23,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:23,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-03-20 18:25:23,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:23,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452273091] [2022-03-20 18:25:23,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452273091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:23,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:23,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:25:23,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353935272] [2022-03-20 18:25:23,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:23,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:25:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:25:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:25:23,651 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:25:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:24,150 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-03-20 18:25:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:25:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2022-03-20 18:25:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:24,151 INFO L225 Difference]: With dead ends: 72 [2022-03-20 18:25:24,151 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 18:25:24,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=2401, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:25:24,152 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:24,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 95 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:25:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 18:25:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-03-20 18:25:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:25:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-20 18:25:24,159 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 56 [2022-03-20 18:25:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:24,159 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-20 18:25:24,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 18:25:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-20 18:25:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 18:25:24,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:24,160 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:24,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:24,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 18:25:24,360 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 17 times [2022-03-20 18:25:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [514934819] [2022-03-20 18:25:24,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:24,362 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:24,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 18 times [2022-03-20 18:25:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:24,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503180549] [2022-03-20 18:25:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 18:25:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 18:25:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 18:25:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:25:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:25:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:25:24,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503180549] [2022-03-20 18:25:24,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503180549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597550178] [2022-03-20 18:25:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:25:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:24,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:25:24,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 18:25:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 18:25:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:25:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:25:24,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597550178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:24,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:24,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-03-20 18:25:24,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [514934819] [2022-03-20 18:25:24,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [514934819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:24,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:24,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:25:24,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488657123] [2022-03-20 18:25:24,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:24,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:25:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:25:24,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:25:24,867 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:25:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:25,095 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-20 18:25:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:25:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2022-03-20 18:25:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:25,096 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:25:25,096 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 18:25:25,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:25:25,097 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:25,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 18:25:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-20 18:25:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:25:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-20 18:25:25,104 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-03-20 18:25:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:25,105 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-20 18:25:25,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:25:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-20 18:25:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 18:25:25,105 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:25,105 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:25,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:25,312 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,SelfDestructingSolverStorable10 [2022-03-20 18:25:25,312 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:25,313 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 19 times [2022-03-20 18:25:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:25,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307729994] [2022-03-20 18:25:25,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:25,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 20 times [2022-03-20 18:25:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:25,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431545292] [2022-03-20 18:25:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 18:25:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 18:25:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:25:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:25:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:25:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:25:25,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:25,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431545292] [2022-03-20 18:25:25,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431545292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:25,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472379943] [2022-03-20 18:25:25,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:25,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:25,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:25,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:25:25,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 18:25:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:25,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:26,735 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:26,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:25:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472379943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:26,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:26,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-03-20 18:25:26,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:26,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307729994] [2022-03-20 18:25:26,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307729994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:26,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:25:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100958827] [2022-03-20 18:25:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:26,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:25:26,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:25:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:25:26,886 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:25:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:27,437 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-03-20 18:25:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:25:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2022-03-20 18:25:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:27,439 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:25:27,439 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 18:25:27,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:25:27,441 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:27,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:25:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 18:25:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-03-20 18:25:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:25:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-20 18:25:27,449 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 66 [2022-03-20 18:25:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:27,450 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-20 18:25:27,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 18:25:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-20 18:25:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 18:25:27,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:27,451 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:27,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:27,671 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,SelfDestructingSolverStorable11 [2022-03-20 18:25:27,672 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 21 times [2022-03-20 18:25:27,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:27,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [749122760] [2022-03-20 18:25:27,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:27,674 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 22 times [2022-03-20 18:25:27,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:27,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851503350] [2022-03-20 18:25:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:27,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 18:25:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 18:25:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:25:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:25:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:25:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 18:25:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 18:25:27,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:27,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851503350] [2022-03-20 18:25:27,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851503350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663303914] [2022-03-20 18:25:27,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:25:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:27,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:27,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:25:27,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:25:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 18:25:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 18:25:28,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 18:25:28,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663303914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:28,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:28,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-03-20 18:25:28,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:28,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [749122760] [2022-03-20 18:25:28,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [749122760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:28,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:28,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:25:28,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633000253] [2022-03-20 18:25:28,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:28,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:25:28,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:25:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:25:28,238 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:25:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:28,490 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-03-20 18:25:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:25:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 74 [2022-03-20 18:25:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:28,492 INFO L225 Difference]: With dead ends: 116 [2022-03-20 18:25:28,492 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 18:25:28,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:25:28,493 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:28,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 18:25:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-20 18:25:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:25:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-20 18:25:28,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-20 18:25:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:28,501 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-20 18:25:28,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:25:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-20 18:25:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 18:25:28,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:28,525 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:28,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:28,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 18:25:28,731 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 23 times [2022-03-20 18:25:28,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:28,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862073968] [2022-03-20 18:25:28,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:28,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 24 times [2022-03-20 18:25:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:28,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000781437] [2022-03-20 18:25:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 18:25:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:25:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 18:25:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 18:25:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 18:25:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 18:25:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 18:25:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:28,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000781437] [2022-03-20 18:25:28,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000781437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:28,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658082538] [2022-03-20 18:25:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:25:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:28,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:28,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:25:29,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 18:25:29,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 18:25:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:29,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:30,305 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:30,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 18:25:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:30,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658082538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:30,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:30,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2022-03-20 18:25:30,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862073968] [2022-03-20 18:25:30,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862073968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:30,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:30,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:25:30,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115380490] [2022-03-20 18:25:30,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:30,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:25:30,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:30,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:25:30,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:25:30,472 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:25:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:31,193 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-03-20 18:25:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:25:31,194 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 76 [2022-03-20 18:25:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:31,195 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:25:31,195 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 18:25:31,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:25:31,196 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:31,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 117 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:25:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 18:25:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-03-20 18:25:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:25:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-20 18:25:31,205 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 76 [2022-03-20 18:25:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:31,205 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-20 18:25:31,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 18:25:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-20 18:25:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 18:25:31,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:31,205 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:31,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:31,423 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,SelfDestructingSolverStorable13 [2022-03-20 18:25:31,423 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 25 times [2022-03-20 18:25:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:31,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1188990292] [2022-03-20 18:25:31,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:31,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 26 times [2022-03-20 18:25:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:31,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642322362] [2022-03-20 18:25:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 18:25:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:25:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 18:25:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 18:25:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 18:25:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 18:25:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 18:25:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 87 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:25:31,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:31,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642322362] [2022-03-20 18:25:31,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642322362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965829689] [2022-03-20 18:25:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:31,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:31,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:25:31,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:31,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 18:25:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:25:31,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:25:32,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965829689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:32,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:32,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-03-20 18:25:32,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1188990292] [2022-03-20 18:25:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1188990292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:32,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:32,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:25:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934377442] [2022-03-20 18:25:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:32,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:25:32,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:25:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:25:32,068 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:25:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:32,379 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-03-20 18:25:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:25:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 84 [2022-03-20 18:25:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:32,380 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:25:32,380 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 18:25:32,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:25:32,381 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:32,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 59 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:25:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 18:25:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-20 18:25:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:25:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-20 18:25:32,390 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-03-20 18:25:32,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:32,391 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-20 18:25:32,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:25:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-20 18:25:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 18:25:32,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:32,392 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:32,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:32,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:32,603 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 27 times [2022-03-20 18:25:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:32,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130963529] [2022-03-20 18:25:32,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:32,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 28 times [2022-03-20 18:25:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954007836] [2022-03-20 18:25:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 18:25:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 18:25:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:25:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 18:25:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 18:25:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 18:25:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 18:25:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:25:32,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954007836] [2022-03-20 18:25:32,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954007836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829766216] [2022-03-20 18:25:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:25:32,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:32,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:32,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:32,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:25:32,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:25:32,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 18:25:32,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:33,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:25:34,517 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:25:34,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:25:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 18:25:34,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:34,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829766216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:34,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:25:34,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-03-20 18:25:34,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:34,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130963529] [2022-03-20 18:25:34,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130963529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:25:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769339752] [2022-03-20 18:25:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:34,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:25:34,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:25:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:25:34,677 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:25:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:35,494 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-03-20 18:25:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:25:35,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 86 [2022-03-20 18:25:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:35,495 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:25:35,495 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 18:25:35,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=4435, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:25:35,497 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:35,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:25:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 18:25:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-03-20 18:25:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:25:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-20 18:25:35,507 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2022-03-20 18:25:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:35,507 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-20 18:25:35,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 18:25:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-20 18:25:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 18:25:35,508 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:35,508 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:35,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:35,723 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,SelfDestructingSolverStorable15 [2022-03-20 18:25:35,723 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 29 times [2022-03-20 18:25:35,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:35,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371109309] [2022-03-20 18:25:35,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:35,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 30 times [2022-03-20 18:25:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:35,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429000043] [2022-03-20 18:25:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:35,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 18:25:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 18:25:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:25:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 18:25:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 18:25:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 18:25:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 18:25:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 18:25:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 115 proven. 93 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:25:35,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429000043] [2022-03-20 18:25:35,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429000043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959757517] [2022-03-20 18:25:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:25:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:35,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:35,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:25:35,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 18:25:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 18:25:35,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:25:36,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:25:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:25:36,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959757517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:25:36,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:25:36,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-03-20 18:25:36,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:36,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371109309] [2022-03-20 18:25:36,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371109309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:36,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:36,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:25:36,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112606820] [2022-03-20 18:25:36,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:36,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:25:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:25:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:25:36,453 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:25:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:36,797 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-03-20 18:25:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:25:36,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 94 [2022-03-20 18:25:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:36,798 INFO L225 Difference]: With dead ends: 144 [2022-03-20 18:25:36,798 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 18:25:36,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=2162, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:25:36,799 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:36,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:25:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 18:25:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 18:25:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:25:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-20 18:25:36,810 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-03-20 18:25:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:36,810 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-20 18:25:36,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:25:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-20 18:25:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 18:25:36,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:36,811 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:36,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 18:25:37,023 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,SelfDestructingSolverStorable16 [2022-03-20 18:25:37,023 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 31 times [2022-03-20 18:25:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436201551] [2022-03-20 18:25:37,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:25:37,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:25:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 32 times [2022-03-20 18:25:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:37,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142674290] [2022-03-20 18:25:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 18:25:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 18:25:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:25:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:25:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 18:25:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 18:25:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 18:25:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 18:25:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:25:37,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142674290] [2022-03-20 18:25:37,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142674290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:25:37,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751708799] [2022-03-20 18:25:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:25:37,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:25:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:25:37,345 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:25:37,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:25:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:25:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:25:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 18:25:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:25:37,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:27:13,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 18:27:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:27:13,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:27:15,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 18:27:15,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 18:27:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:27:15,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751708799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:27:15,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:27:15,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 38 [2022-03-20 18:27:15,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436201551] [2022-03-20 18:27:15,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436201551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:15,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:15,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:27:15,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778721061] [2022-03-20 18:27:15,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:15,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:27:15,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:27:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1291, Unknown=9, NotChecked=0, Total=1406 [2022-03-20 18:27:15,441 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:27:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:16,333 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-03-20 18:27:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:27:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 96 [2022-03-20 18:27:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:16,336 INFO L225 Difference]: With dead ends: 112 [2022-03-20 18:27:16,336 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 18:27:16,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 178 SyntacticMatches, 20 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 98.1s TimeCoverageRelationStatistics Valid=244, Invalid=3529, Unknown=9, NotChecked=0, Total=3782 [2022-03-20 18:27:16,338 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:16,338 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:27:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 18:27:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-03-20 18:27:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:27:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-20 18:27:16,349 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 96 [2022-03-20 18:27:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:16,349 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-20 18:27:16,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 18:27:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-20 18:27:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 18:27:16,350 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:16,350 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:16,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 18:27:16,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 18:27:16,561 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 33 times [2022-03-20 18:27:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:16,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336419370] [2022-03-20 18:27:16,563 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:27:16,563 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:27:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 34 times [2022-03-20 18:27:16,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:16,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777643598] [2022-03-20 18:27:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 18:27:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 18:27:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:27:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:27:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 18:27:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 18:27:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 18:27:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 18:27:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-20 18:27:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 147 proven. 114 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 18:27:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777643598] [2022-03-20 18:27:16,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777643598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086390051] [2022-03-20 18:27:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:27:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:16,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:27:16,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:27:16,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:27:16,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:27:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 18:27:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:27:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 18:27:17,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:27:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 18:27:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086390051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:27:17,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:27:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-03-20 18:27:17,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336419370] [2022-03-20 18:27:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336419370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:17,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:27:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721422237] [2022-03-20 18:27:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:17,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:27:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:27:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:27:17,481 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:27:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:17,901 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-03-20 18:27:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:27:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 104 [2022-03-20 18:27:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:17,902 INFO L225 Difference]: With dead ends: 158 [2022-03-20 18:27:17,902 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 18:27:17,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=582, Invalid=2610, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:27:17,904 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:17,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 18:27:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-20 18:27:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:27:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-20 18:27:17,915 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-03-20 18:27:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:17,916 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-20 18:27:17,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:27:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-20 18:27:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 18:27:17,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:17,916 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:17,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 18:27:18,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:18,131 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 35 times [2022-03-20 18:27:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559749853] [2022-03-20 18:27:18,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:27:18,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:27:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 36 times [2022-03-20 18:27:18,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404031877] [2022-03-20 18:27:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:18,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 18:27:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:27:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:27:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:27:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 18:27:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 18:27:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 18:27:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 18:27:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 18:27:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 18 proven. 262 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 18:27:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404031877] [2022-03-20 18:27:18,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404031877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136175987] [2022-03-20 18:27:18,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:27:18,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:18,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:27:18,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:27:18,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 18:27:18,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:27:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 18:27:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:27:18,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:27:22,890 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:27:22,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:27:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 157 proven. 127 refuted. 28 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 18:27:22,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:27:23,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136175987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:23,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:27:23,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2022-03-20 18:27:23,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:23,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559749853] [2022-03-20 18:27:23,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559749853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:23,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:23,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:27:23,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781440590] [2022-03-20 18:27:23,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:23,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:27:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:27:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2860, Unknown=1, NotChecked=0, Total=3192 [2022-03-20 18:27:23,088 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:27:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:24,180 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-03-20 18:27:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:27:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 106 [2022-03-20 18:27:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:24,186 INFO L225 Difference]: With dead ends: 122 [2022-03-20 18:27:24,186 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 18:27:24,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 88 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=552, Invalid=6253, Unknown=1, NotChecked=0, Total=6806 [2022-03-20 18:27:24,193 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:24,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:27:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 18:27:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-03-20 18:27:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:27:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-03-20 18:27:24,213 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 106 [2022-03-20 18:27:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:24,214 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-03-20 18:27:24,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:27:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-03-20 18:27:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 18:27:24,214 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:24,214 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:24,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 18:27:24,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:24,419 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 37 times [2022-03-20 18:27:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:24,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230771039] [2022-03-20 18:27:24,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:27:24,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:27:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 38 times [2022-03-20 18:27:24,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:24,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104117532] [2022-03-20 18:27:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 18:27:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:27:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:27:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:27:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 18:27:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 18:27:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 18:27:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 18:27:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 18:27:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-20 18:27:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 183 proven. 137 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 18:27:24,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104117532] [2022-03-20 18:27:24,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104117532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320796938] [2022-03-20 18:27:24,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:27:24,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:24,639 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:27:24,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:27:24,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:27:24,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:27:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 18:27:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:27:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 18:27:25,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:27:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 18:27:25,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320796938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:27:25,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:27:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-03-20 18:27:25,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230771039] [2022-03-20 18:27:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230771039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:25,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:27:25,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589701220] [2022-03-20 18:27:25,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:25,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:27:25,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:27:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:27:25,293 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:27:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:25,682 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-03-20 18:27:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:27:25,682 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 114 [2022-03-20 18:27:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:25,683 INFO L225 Difference]: With dead ends: 172 [2022-03-20 18:27:25,683 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 18:27:25,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=3100, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:27:25,684 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:25,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 65 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 18:27:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-03-20 18:27:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:27:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-20 18:27:25,697 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-03-20 18:27:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:25,698 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-20 18:27:25,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:27:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-20 18:27:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 18:27:25,698 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:25,698 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:25,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 18:27:25,907 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,SelfDestructingSolverStorable20 [2022-03-20 18:27:25,907 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 39 times [2022-03-20 18:27:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387970237] [2022-03-20 18:27:25,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:27:25,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:27:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 40 times [2022-03-20 18:27:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753667795] [2022-03-20 18:27:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:25,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:27:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 18:27:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 18:27:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 18:27:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 18:27:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 18:27:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 18:27:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 18:27:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 18:27:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 18:27:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 20 proven. 321 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 18:27:26,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:26,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753667795] [2022-03-20 18:27:26,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753667795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:26,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398219813] [2022-03-20 18:27:26,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:27:26,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:26,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:27:26,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:27:26,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:27:26,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:27:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 18:27:26,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:27:26,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:27:29,090 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:27:29,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:27:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 190 proven. 151 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 18:27:29,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:27:29,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398219813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:29,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:27:29,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2022-03-20 18:27:29,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:29,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387970237] [2022-03-20 18:27:29,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387970237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:29,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:29,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:27:29,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295786035] [2022-03-20 18:27:29,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:29,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:27:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:27:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:27:29,288 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:27:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:30,535 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-03-20 18:27:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:27:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 116 [2022-03-20 18:27:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:30,537 INFO L225 Difference]: With dead ends: 132 [2022-03-20 18:27:30,537 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 18:27:30,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 20 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=575, Invalid=7081, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:27:30,538 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 80 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:30,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 157 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:27:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 18:27:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-03-20 18:27:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:27:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-20 18:27:30,552 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 116 [2022-03-20 18:27:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:30,553 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-20 18:27:30,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 18:27:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-20 18:27:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 18:27:30,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:30,553 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:30,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 18:27:30,754 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,SelfDestructingSolverStorable21 [2022-03-20 18:27:30,754 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 41 times [2022-03-20 18:27:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1615072326] [2022-03-20 18:27:30,755 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:27:30,755 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:27:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 42 times [2022-03-20 18:27:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393806357] [2022-03-20 18:27:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:27:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 18:27:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 18:27:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 18:27:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 18:27:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 18:27:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 18:27:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 18:27:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 18:27:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 18:27:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-20 18:27:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 223 proven. 162 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 18:27:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:31,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393806357] [2022-03-20 18:27:31,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393806357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:31,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962951270] [2022-03-20 18:27:31,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:27:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:31,012 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:27:31,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:27:31,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-20 18:27:31,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:27:31,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 18:27:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:27:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 18:27:31,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:27:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 18:27:31,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962951270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:27:31,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:27:31,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2022-03-20 18:27:31,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1615072326] [2022-03-20 18:27:31,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1615072326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:31,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:31,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:27:31,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77688544] [2022-03-20 18:27:31,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:31,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:27:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:27:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:27:31,789 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:27:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:32,297 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2022-03-20 18:27:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:27:32,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 124 [2022-03-20 18:27:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:32,299 INFO L225 Difference]: With dead ends: 186 [2022-03-20 18:27:32,299 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 18:27:32,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=790, Invalid=3632, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:27:32,301 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:32,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 82 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 18:27:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-03-20 18:27:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:27:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-03-20 18:27:32,317 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-03-20 18:27:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:32,317 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-03-20 18:27:32,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:27:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-03-20 18:27:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 18:27:32,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:32,317 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:32,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 18:27:32,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:32,522 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:32,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 43 times [2022-03-20 18:27:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:32,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802629126] [2022-03-20 18:27:32,523 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:27:32,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:27:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 44 times [2022-03-20 18:27:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:32,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321085414] [2022-03-20 18:27:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 18:27:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:27:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 18:27:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 18:27:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 18:27:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 18:27:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 18:27:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 18:27:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 18:27:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 18:27:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-20 18:27:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 18:27:32,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321085414] [2022-03-20 18:27:32,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321085414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:27:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107628595] [2022-03-20 18:27:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:27:32,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:27:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:32,969 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:27:32,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:27:33,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:27:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:27:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 18:27:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:27:33,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:31:11,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 18:31:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 18:31:11,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:13,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 18:31:13,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 18:31:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 18:31:13,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107628595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:13,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:13,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 47 [2022-03-20 18:31:13,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:13,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802629126] [2022-03-20 18:31:13,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802629126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:13,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:13,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:31:13,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779362435] [2022-03-20 18:31:13,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:13,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:31:13,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:31:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2017, Unknown=12, NotChecked=0, Total=2162 [2022-03-20 18:31:13,969 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:31:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:15,404 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-03-20 18:31:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:31:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 126 [2022-03-20 18:31:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:15,405 INFO L225 Difference]: With dead ends: 142 [2022-03-20 18:31:15,405 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 18:31:15,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 235 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 221.1s TimeCoverageRelationStatistics Valid=304, Invalid=5536, Unknown=12, NotChecked=0, Total=5852 [2022-03-20 18:31:15,406 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:15,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 168 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:31:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 18:31:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2022-03-20 18:31:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:31:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-03-20 18:31:15,423 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2022-03-20 18:31:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:15,423 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-03-20 18:31:15,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 18:31:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-03-20 18:31:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 18:31:15,424 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:15,424 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:15,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:15,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:15,624 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 45 times [2022-03-20 18:31:15,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:15,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462545275] [2022-03-20 18:31:15,626 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:31:15,626 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 46 times [2022-03-20 18:31:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:15,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464411904] [2022-03-20 18:31:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 18:31:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:31:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 18:31:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 18:31:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 18:31:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 18:31:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 18:31:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 18:31:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 18:31:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 18:31:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-20 18:31:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 18:31:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 267 proven. 189 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 18:31:15,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464411904] [2022-03-20 18:31:15,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464411904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584222352] [2022-03-20 18:31:15,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:15,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:15,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:15,926 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:15,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:31:16,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:16,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 18:31:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 18:31:16,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 18:31:17,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584222352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:17,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:17,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 45 [2022-03-20 18:31:17,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:17,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462545275] [2022-03-20 18:31:17,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462545275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:17,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:17,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:31:17,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488257174] [2022-03-20 18:31:17,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:17,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:31:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:31:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:31:17,095 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:31:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:17,703 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2022-03-20 18:31:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:31:17,703 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 134 [2022-03-20 18:31:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:17,704 INFO L225 Difference]: With dead ends: 200 [2022-03-20 18:31:17,704 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 18:31:17,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=906, Invalid=4206, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:31:17,706 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:17,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 89 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:31:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 18:31:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-20 18:31:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.018348623853211) internal successors, (111), 110 states have internal predecessors, (111), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:31:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-20 18:31:17,723 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-03-20 18:31:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:17,724 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-20 18:31:17,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:31:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-20 18:31:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 18:31:17,725 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:17,725 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:17,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:17,929 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,SelfDestructingSolverStorable24 [2022-03-20 18:31:17,929 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 47 times [2022-03-20 18:31:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:17,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889622805] [2022-03-20 18:31:17,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:31:17,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:17,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 48 times [2022-03-20 18:31:17,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:17,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581406131] [2022-03-20 18:31:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:17,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 18:31:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:31:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:31:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 18:31:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 18:31:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 18:31:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 18:31:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-20 18:31:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 18:31:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-20 18:31:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-20 18:31:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-20 18:31:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 24 proven. 457 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 18:31:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581406131] [2022-03-20 18:31:18,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581406131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:18,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545600297] [2022-03-20 18:31:18,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:18,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:18,652 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:18,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:31:18,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-20 18:31:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:18,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 18:31:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:19,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:31:22,793 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:31:22,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:31:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 276 proven. 205 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 18:31:22,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:22,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545600297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:22,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:31:22,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 66 [2022-03-20 18:31:22,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889622805] [2022-03-20 18:31:22,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889622805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:22,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:22,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:31:22,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069805047] [2022-03-20 18:31:22,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:22,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:31:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:31:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:31:22,998 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:31:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:24,655 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-03-20 18:31:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:31:24,655 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 136 [2022-03-20 18:31:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:24,656 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:31:24,656 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 18:31:24,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 112 SyntacticMatches, 24 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=727, Invalid=9173, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:31:24,661 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:24,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 151 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:31:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 18:31:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-03-20 18:31:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 115 states have (on average 1.017391304347826) internal successors, (117), 116 states have internal predecessors, (117), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:31:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-03-20 18:31:24,684 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 136 [2022-03-20 18:31:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:24,685 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-03-20 18:31:24,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:31:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-03-20 18:31:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 18:31:24,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:24,685 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:24,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:24,899 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,SelfDestructingSolverStorable25 [2022-03-20 18:31:24,899 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 49 times [2022-03-20 18:31:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251259567] [2022-03-20 18:31:24,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:31:24,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 50 times [2022-03-20 18:31:24,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:24,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177551208] [2022-03-20 18:31:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 18:31:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:31:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:31:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 18:31:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 18:31:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 18:31:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 18:31:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-20 18:31:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 18:31:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-20 18:31:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-20 18:31:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-20 18:31:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-20 18:31:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 315 proven. 218 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 18:31:25,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:25,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177551208] [2022-03-20 18:31:25,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177551208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:25,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467991191] [2022-03-20 18:31:25,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:31:25,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:25,260 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:25,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:31:25,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:31:25,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:25,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 18:31:25,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 18:31:25,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 18:31:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467991191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:26,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:26,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 48 [2022-03-20 18:31:26,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:26,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251259567] [2022-03-20 18:31:26,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251259567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:26,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:26,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:31:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661771123] [2022-03-20 18:31:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:26,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:31:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:31:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:31:26,170 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:31:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:26,794 INFO L93 Difference]: Finished difference Result 214 states and 229 transitions. [2022-03-20 18:31:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:31:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 144 [2022-03-20 18:31:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:26,796 INFO L225 Difference]: With dead ends: 214 [2022-03-20 18:31:26,796 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 18:31:26,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1030, Invalid=4822, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:31:26,797 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:26,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 71 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:31:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 18:31:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-03-20 18:31:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:31:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-03-20 18:31:26,817 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-03-20 18:31:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:26,817 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-03-20 18:31:26,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:31:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-03-20 18:31:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 18:31:26,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:26,818 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:26,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 18:31:27,026 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,SelfDestructingSolverStorable26 [2022-03-20 18:31:27,026 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 51 times [2022-03-20 18:31:27,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:27,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063478249] [2022-03-20 18:31:27,028 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:31:27,028 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 52 times [2022-03-20 18:31:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940519098] [2022-03-20 18:31:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:27,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:31:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:31:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:31:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 18:31:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 18:31:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 18:31:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 18:31:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 18:31:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-20 18:31:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-20 18:31:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-20 18:31:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-20 18:31:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-20 18:31:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 26 proven. 534 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 18:31:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940519098] [2022-03-20 18:31:27,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940519098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120162447] [2022-03-20 18:31:27,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:27,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:27,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:27,629 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:27,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:31:28,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:28,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:28,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 18:31:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:28,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:31:31,931 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:31:31,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:31:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 325 proven. 235 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 18:31:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:32,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120162447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:32,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:31:32,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 70 [2022-03-20 18:31:32,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063478249] [2022-03-20 18:31:32,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063478249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:32,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:32,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:31:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229182003] [2022-03-20 18:31:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:32,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:31:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:31:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4623, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:31:32,387 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:31:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:34,272 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2022-03-20 18:31:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:31:34,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 146 [2022-03-20 18:31:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:34,273 INFO L225 Difference]: With dead ends: 162 [2022-03-20 18:31:34,273 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 18:31:34,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 120 SyntacticMatches, 26 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=791, Invalid=10339, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:31:34,274 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:34,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 186 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 18:31:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 18:31:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2022-03-20 18:31:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 123 states have (on average 1.016260162601626) internal successors, (125), 124 states have internal predecessors, (125), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:31:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-20 18:31:34,295 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 146 [2022-03-20 18:31:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:34,295 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-20 18:31:34,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:31:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-20 18:31:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 18:31:34,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:34,296 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:34,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:34,508 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,SelfDestructingSolverStorable27 [2022-03-20 18:31:34,509 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 53 times [2022-03-20 18:31:34,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:34,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1215023774] [2022-03-20 18:31:34,510 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:31:34,510 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 54 times [2022-03-20 18:31:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:34,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994295879] [2022-03-20 18:31:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:31:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:31:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:31:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 18:31:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 18:31:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 18:31:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 18:31:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 18:31:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-20 18:31:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-20 18:31:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-20 18:31:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-20 18:31:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-20 18:31:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-20 18:31:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 367 proven. 249 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 18:31:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994295879] [2022-03-20 18:31:34,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994295879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155414053] [2022-03-20 18:31:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:34,871 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:34,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:31:35,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-20 18:31:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 18:31:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 18:31:35,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 18:31:36,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155414053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:36,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:36,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 51 [2022-03-20 18:31:36,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:36,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1215023774] [2022-03-20 18:31:36,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1215023774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:36,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:36,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:31:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821851451] [2022-03-20 18:31:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:36,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:31:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:31:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:31:36,022 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:31:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:36,684 INFO L93 Difference]: Finished difference Result 228 states and 244 transitions. [2022-03-20 18:31:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:31:36,685 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 154 [2022-03-20 18:31:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:36,685 INFO L225 Difference]: With dead ends: 228 [2022-03-20 18:31:36,685 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 18:31:36,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=5480, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:31:36,687 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:36,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:31:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 18:31:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-03-20 18:31:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.016) internal successors, (127), 126 states have internal predecessors, (127), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:31:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-03-20 18:31:36,708 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2022-03-20 18:31:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:36,708 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-03-20 18:31:36,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:31:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-03-20 18:31:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 18:31:36,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:36,709 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:36,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:36,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 18:31:36,919 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 55 times [2022-03-20 18:31:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528215178] [2022-03-20 18:31:36,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:31:36,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 56 times [2022-03-20 18:31:36,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868005313] [2022-03-20 18:31:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 18:31:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 18:31:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 18:31:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 18:31:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 18:31:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 18:31:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 18:31:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 18:31:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 18:31:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-20 18:31:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-20 18:31:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-20 18:31:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-20 18:31:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-20 18:31:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 18:31:37,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868005313] [2022-03-20 18:31:37,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868005313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549287700] [2022-03-20 18:31:37,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:31:37,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:37,526 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:37,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:31:37,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:31:37,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 18:31:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:37,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:37:26,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 18:37:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 18:37:26,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:28,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 18:37:28,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 18:37:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-20 18:37:28,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549287700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:28,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:28,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 36] total 56 [2022-03-20 18:37:28,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:28,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528215178] [2022-03-20 18:37:28,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528215178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:28,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:28,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:37:28,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234080141] [2022-03-20 18:37:28,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:28,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:37:28,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:37:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2905, Unknown=15, NotChecked=0, Total=3080 [2022-03-20 18:37:28,987 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:37:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:31,027 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-03-20 18:37:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:37:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 156 [2022-03-20 18:37:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:31,028 INFO L225 Difference]: With dead ends: 172 [2022-03-20 18:37:31,028 INFO L226 Difference]: Without dead ends: 170 [2022-03-20 18:37:31,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 292 SyntacticMatches, 32 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 351.7s TimeCoverageRelationStatistics Valid=364, Invalid=7993, Unknown=15, NotChecked=0, Total=8372 [2022-03-20 18:37:31,029 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 100 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4040 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:31,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 201 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4040 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:37:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-20 18:37:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-03-20 18:37:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 131 states have (on average 1.015267175572519) internal successors, (133), 132 states have internal predecessors, (133), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:37:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-03-20 18:37:31,055 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 156 [2022-03-20 18:37:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:31,056 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-03-20 18:37:31,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 18:37:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-03-20 18:37:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-20 18:37:31,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:31,057 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:31,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 18:37:31,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:31,261 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 57 times [2022-03-20 18:37:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:31,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128979396] [2022-03-20 18:37:31,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:37:31,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 58 times [2022-03-20 18:37:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118811859] [2022-03-20 18:37:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 18:37:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 18:37:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 18:37:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 18:37:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-20 18:37:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 18:37:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 18:37:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 18:37:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-20 18:37:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-20 18:37:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-20 18:37:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-20 18:37:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-20 18:37:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-20 18:37:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-20 18:37:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 423 proven. 282 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 18:37:31,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118811859] [2022-03-20 18:37:31,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118811859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497950878] [2022-03-20 18:37:31,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:37:31,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:31,673 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:31,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:37:32,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:37:32,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 18:37:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 18:37:32,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 18:37:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497950878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:32,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-20 18:37:32,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128979396] [2022-03-20 18:37:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128979396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:32,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:37:32,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217705547] [2022-03-20 18:37:32,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:32,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:37:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:37:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=2226, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:37:32,956 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:37:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:33,803 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2022-03-20 18:37:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:37:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 164 [2022-03-20 18:37:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:33,805 INFO L225 Difference]: With dead ends: 242 [2022-03-20 18:37:33,805 INFO L226 Difference]: Without dead ends: 170 [2022-03-20 18:37:33,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1302, Invalid=6180, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:37:33,806 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:33,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 115 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:37:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-20 18:37:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-03-20 18:37:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:37:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-20 18:37:33,832 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-03-20 18:37:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:33,832 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-20 18:37:33,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:37:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-20 18:37:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-20 18:37:33,833 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:33,833 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:33,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 18:37:34,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 18:37:34,047 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 59 times [2022-03-20 18:37:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527563198] [2022-03-20 18:37:34,049 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:37:34,049 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 60 times [2022-03-20 18:37:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:34,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399495967] [2022-03-20 18:37:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:37:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 18:37:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 18:37:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 18:37:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 18:37:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 18:37:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 18:37:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 18:37:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 18:37:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-20 18:37:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 18:37:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-20 18:37:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-20 18:37:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-20 18:37:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-20 18:37:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 30 proven. 706 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 18:37:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:34,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399495967] [2022-03-20 18:37:34,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399495967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:34,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734779463] [2022-03-20 18:37:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:37:34,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:34,766 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:34,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 18:37:35,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-20 18:37:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 18:37:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:35,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:37:40,094 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:37:40,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:37:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 435 proven. 301 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 18:37:40,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:40,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734779463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:40,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:37:40,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 78 [2022-03-20 18:37:40,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:40,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527563198] [2022-03-20 18:37:40,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527563198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:40,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:40,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:37:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377413584] [2022-03-20 18:37:40,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:40,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:37:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:37:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=5720, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:37:40,456 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:37:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:42,922 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2022-03-20 18:37:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:37:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 166 [2022-03-20 18:37:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:42,936 INFO L225 Difference]: With dead ends: 182 [2022-03-20 18:37:42,936 INFO L226 Difference]: Without dead ends: 180 [2022-03-20 18:37:42,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 136 SyntacticMatches, 30 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=955, Invalid=12851, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:37:42,938 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:42,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 18:37:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-20 18:37:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-03-20 18:37:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 139 states have (on average 1.014388489208633) internal successors, (141), 140 states have internal predecessors, (141), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:37:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-03-20 18:37:42,970 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 166 [2022-03-20 18:37:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:42,970 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-03-20 18:37:42,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:37:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-03-20 18:37:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-20 18:37:42,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:42,972 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:42,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 18:37:43,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:43,187 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 61 times [2022-03-20 18:37:43,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:43,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899359269] [2022-03-20 18:37:43,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:37:43,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 62 times [2022-03-20 18:37:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049403998] [2022-03-20 18:37:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 18:37:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 18:37:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 18:37:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-20 18:37:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 18:37:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 18:37:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 18:37:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 18:37:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 18:37:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-20 18:37:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-20 18:37:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-20 18:37:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-20 18:37:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-20 18:37:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-20 18:37:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-20 18:37:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 483 proven. 317 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 18:37:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:43,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049403998] [2022-03-20 18:37:43,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049403998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:43,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238348584] [2022-03-20 18:37:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:37:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:43,668 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:43,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 18:37:43,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:37:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:43,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 18:37:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 18:37:44,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 18:37:44,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238348584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:44,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 57 [2022-03-20 18:37:44,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:44,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899359269] [2022-03-20 18:37:44,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899359269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:44,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:44,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:37:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794575985] [2022-03-20 18:37:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:44,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:37:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:37:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=2483, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:37:44,782 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:37:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:45,629 INFO L93 Difference]: Finished difference Result 256 states and 274 transitions. [2022-03-20 18:37:45,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:37:45,630 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 174 [2022-03-20 18:37:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:45,631 INFO L225 Difference]: With dead ends: 256 [2022-03-20 18:37:45,631 INFO L226 Difference]: Without dead ends: 180 [2022-03-20 18:37:45,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1450, Invalid=6922, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:37:45,632 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:45,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:37:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-20 18:37:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-03-20 18:37:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 142 states have internal predecessors, (143), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:37:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-03-20 18:37:45,660 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2022-03-20 18:37:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:45,660 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-03-20 18:37:45,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:37:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-03-20 18:37:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 18:37:45,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:45,661 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:45,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 18:37:45,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:45,873 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 63 times [2022-03-20 18:37:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:45,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662455318] [2022-03-20 18:37:45,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:37:45,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 64 times [2022-03-20 18:37:45,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:45,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061429413] [2022-03-20 18:37:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:37:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:37:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 18:37:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 18:37:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 18:37:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 18:37:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-20 18:37:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 18:37:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-20 18:37:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-20 18:37:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-20 18:37:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-20 18:37:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-20 18:37:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-20 18:37:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-20 18:37:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-20 18:37:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 32 proven. 801 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 18:37:46,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:46,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061429413] [2022-03-20 18:37:46,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061429413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:46,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439906545] [2022-03-20 18:37:46,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:37:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:46,599 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:46,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 18:37:47,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:37:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 18:37:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:47,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 18:37:52,423 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 18:37:52,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 18:37:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 496 proven. 337 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 18:37:52,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:52,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439906545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:52,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 18:37:52,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 82 [2022-03-20 18:37:52,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662455318] [2022-03-20 18:37:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662455318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:52,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:52,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:37:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760151886] [2022-03-20 18:37:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:52,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:37:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:37:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=6312, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:37:52,690 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:37:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:55,358 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-03-20 18:37:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:37:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 176 [2022-03-20 18:37:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:55,359 INFO L225 Difference]: With dead ends: 192 [2022-03-20 18:37:55,360 INFO L226 Difference]: Without dead ends: 190 [2022-03-20 18:37:55,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 144 SyntacticMatches, 32 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1043, Invalid=14209, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:37:55,361 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:55,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 223 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 18:37:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-20 18:37:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2022-03-20 18:37:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 148 states have internal predecessors, (149), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 18:37:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-20 18:37:55,397 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 176 [2022-03-20 18:37:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:55,397 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-20 18:37:55,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 18:37:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-20 18:37:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-20 18:37:55,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:55,398 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:55,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 18:37:55,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 18:37:55,615 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 65 times [2022-03-20 18:37:55,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:55,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973941826] [2022-03-20 18:37:55,616 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:37:55,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 66 times [2022-03-20 18:37:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:55,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664019852] [2022-03-20 18:37:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:55,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 18:37:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 18:37:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 18:37:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-20 18:37:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-20 18:37:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 18:37:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-20 18:37:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-20 18:37:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-20 18:37:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-20 18:37:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-20 18:37:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-20 18:37:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-20 18:37:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-20 18:37:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-20 18:37:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-20 18:37:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-03-20 18:37:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 547 proven. 354 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 18:37:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:56,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664019852] [2022-03-20 18:37:56,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664019852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:56,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617499155] [2022-03-20 18:37:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:37:56,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:56,077 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:56,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 18:37:56,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-20 18:37:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:56,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 18:37:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 18:37:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 18:37:58,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617499155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:58,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:58,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 60 [2022-03-20 18:37:58,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973941826] [2022-03-20 18:37:58,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973941826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:58,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:58,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:37:58,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158892938] [2022-03-20 18:37:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:58,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:37:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:37:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=2754, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:37:58,016 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:37:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:58,850 INFO L93 Difference]: Finished difference Result 270 states and 289 transitions. [2022-03-20 18:37:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:37:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 184 [2022-03-20 18:37:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:58,851 INFO L225 Difference]: With dead ends: 270 [2022-03-20 18:37:58,851 INFO L226 Difference]: Without dead ends: 190 [2022-03-20 18:37:58,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 383 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1606, Invalid=7706, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:37:58,853 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:58,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 94 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:37:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-20 18:37:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-03-20 18:37:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 150 states have internal predecessors, (151), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 18:37:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-03-20 18:37:58,883 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-03-20 18:37:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:58,883 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-03-20 18:37:58,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:37:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-03-20 18:37:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-03-20 18:37:58,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:58,884 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:58,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 18:37:59,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 18:37:59,099 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 67 times [2022-03-20 18:37:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1498905398] [2022-03-20 18:37:59,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:37:59,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:59,101 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 68 times [2022-03-20 18:37:59,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:59,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905432130] [2022-03-20 18:37:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 18:37:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 18:37:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 18:37:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 18:37:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-20 18:37:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 18:37:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-20 18:37:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-20 18:37:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-20 18:37:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-20 18:37:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-20 18:37:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-20 18:37:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-20 18:37:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-20 18:37:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-20 18:37:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-20 18:37:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-20 18:37:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 34 proven. 902 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 18:37:59,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:59,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905432130] [2022-03-20 18:37:59,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905432130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106326] [2022-03-20 18:37:59,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:37:59,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:59,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:59,928 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:59,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 18:38:00,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:38:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:38:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 18:38:00,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:38:00,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11