/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:33:10,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:33:10,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:33:10,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:33:10,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:33:10,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:33:10,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:33:10,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:33:10,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:33:10,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:33:10,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:33:10,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:33:10,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:33:10,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:33:10,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:33:10,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:33:10,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:33:10,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:33:10,755 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:33:10,756 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:33:11,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:33:11,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:33:11,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:33:11,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:33:11,104 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:33:11,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-19 07:33:11,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e427aedde/343fa59dead44f67bad5ed2db8a0d0f3/FLAG9e46600cb [2022-03-19 07:33:11,536 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:33:11,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-19 07:33:11,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e427aedde/343fa59dead44f67bad5ed2db8a0d0f3/FLAG9e46600cb [2022-03-19 07:33:11,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e427aedde/343fa59dead44f67bad5ed2db8a0d0f3 [2022-03-19 07:33:11,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:33:11,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:33:11,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:33:11,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:33:11,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:33:11,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:33:11" (1/1) ... [2022-03-19 07:33:11,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3391426c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:11, skipping insertion in model container [2022-03-19 07:33:11,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:33:11" (1/1) ... [2022-03-19 07:33:11,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:33:11,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:33:12,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-03-19 07:33:12,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:33:12,140 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:33:12,149 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-03-19 07:33:12,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:33:12,164 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:33:12,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12 WrapperNode [2022-03-19 07:33:12,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:33:12,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:33:12,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:33:12,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:33:12,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:33:12,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:33:12,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:33:12,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:33:12,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (1/1) ... [2022-03-19 07:33:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:33:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:12,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 07:33:12,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 07:33:12,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:33:12,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:33:12,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:33:12,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 07:33:12,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 07:33:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 07:33:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:33:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 07:33:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:33:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:33:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:33:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:33:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:33:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:33:12,318 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:33:12,319 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:33:12,401 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:33:12,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:33:12,405 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 07:33:12,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:33:12 BoogieIcfgContainer [2022-03-19 07:33:12,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:33:12,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:33:12,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:33:12,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:33:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:33:11" (1/3) ... [2022-03-19 07:33:12,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3cab5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:33:12, skipping insertion in model container [2022-03-19 07:33:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:33:12" (2/3) ... [2022-03-19 07:33:12,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3cab5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:33:12, skipping insertion in model container [2022-03-19 07:33:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:33:12" (3/3) ... [2022-03-19 07:33:12,412 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2022-03-19 07:33:12,416 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:33:12,416 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:33:12,455 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:33:12,460 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 07:33:12,460 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:33:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:33:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 07:33:12,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:12,478 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:12,478 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 1 times [2022-03-19 07:33:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969815888] [2022-03-19 07:33:12,507 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:33:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 2 times [2022-03-19 07:33:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:12,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946371077] [2022-03-19 07:33:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:12,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:33:12,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946371077] [2022-03-19 07:33:12,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946371077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:12,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:12,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:33:12,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:12,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969815888] [2022-03-19 07:33:12,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969815888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:12,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:12,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:33:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926253533] [2022-03-19 07:33:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:12,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 07:33:12,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 07:33:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 07:33:12,740 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:12,787 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-03-19 07:33:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 07:33:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 07:33:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:12,798 INFO L225 Difference]: With dead ends: 40 [2022-03-19 07:33:12,799 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 07:33:12,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 07:33:12,806 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:12,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 07:33:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 07:33:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-19 07:33:12,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-03-19 07:33:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:12,840 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-19 07:33:12,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-19 07:33:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 07:33:12,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:12,842 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:12,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:33:12,842 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:12,844 INFO L85 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 1 times [2022-03-19 07:33:12,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:12,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351494028] [2022-03-19 07:33:12,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:33:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 2 times [2022-03-19 07:33:12,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:12,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913923448] [2022-03-19 07:33:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:12,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:33:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913923448] [2022-03-19 07:33:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913923448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:12,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:33:12,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351494028] [2022-03-19 07:33:12,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351494028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:12,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:12,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:33:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305400844] [2022-03-19 07:33:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:12,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:33:12,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:33:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:33:12,936 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:12,986 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-03-19 07:33:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 07:33:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 07:33:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:12,989 INFO L225 Difference]: With dead ends: 32 [2022-03-19 07:33:12,990 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 07:33:12,990 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:33:12,995 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:12,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 07:33:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-03-19 07:33:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-19 07:33:13,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-03-19 07:33:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:13,014 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-19 07:33:13,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-19 07:33:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 07:33:13,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:13,015 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:13,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:33:13,016 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 1 times [2022-03-19 07:33:13,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985810715] [2022-03-19 07:33:13,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:13,028 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 2 times [2022-03-19 07:33:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:13,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307702289] [2022-03-19 07:33:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:13,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:13,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:33:13,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:13,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307702289] [2022-03-19 07:33:13,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307702289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:13,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063430405] [2022-03-19 07:33:13,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:13,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:13,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:13,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 07:33:13,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 07:33:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:33:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 07:33:13,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 07:33:13,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063430405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:13,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 07:33:13,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-03-19 07:33:13,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:13,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985810715] [2022-03-19 07:33:13,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985810715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:13,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:13,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:33:13,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417159527] [2022-03-19 07:33:13,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:13,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:33:13,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:33:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 07:33:13,207 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:13,235 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-03-19 07:33:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:33:13,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-19 07:33:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:13,236 INFO L225 Difference]: With dead ends: 27 [2022-03-19 07:33:13,236 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 07:33:13,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 07:33:13,237 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:13,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 07:33:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-03-19 07:33:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-19 07:33:13,241 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2022-03-19 07:33:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:13,242 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-19 07:33:13,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-19 07:33:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 07:33:13,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:13,243 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:13,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:13,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:13,460 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1018715970, now seen corresponding path program 1 times [2022-03-19 07:33:13,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:13,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128628276] [2022-03-19 07:33:13,462 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:13,462 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1018715970, now seen corresponding path program 2 times [2022-03-19 07:33:13,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:13,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612508070] [2022-03-19 07:33:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:13,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:33:13,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:13,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612508070] [2022-03-19 07:33:13,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612508070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:13,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022625666] [2022-03-19 07:33:13,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:13,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:13,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:13,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:13,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 07:33:13,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:13,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 07:33:13,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:33:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:33:13,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022625666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:13,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:13,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 07:33:13,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128628276] [2022-03-19 07:33:13,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128628276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:13,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:13,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:33:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520192757] [2022-03-19 07:33:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:13,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:33:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:33:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 07:33:13,768 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:13,805 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-19 07:33:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:33:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 07:33:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:13,805 INFO L225 Difference]: With dead ends: 39 [2022-03-19 07:33:13,806 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 07:33:13,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:33:13,806 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:13,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 07:33:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-03-19 07:33:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-19 07:33:13,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2022-03-19 07:33:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:13,810 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-19 07:33:13,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-19 07:33:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 07:33:13,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:13,811 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:13,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:14,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 07:33:14,028 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 3 times [2022-03-19 07:33:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240538972] [2022-03-19 07:33:14,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:14,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 4 times [2022-03-19 07:33:14,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:14,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773320690] [2022-03-19 07:33:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:33:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:14,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773320690] [2022-03-19 07:33:14,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773320690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:14,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009752573] [2022-03-19 07:33:14,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:14,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:14,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:14,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 07:33:14,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:33:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:33:14,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:33:14,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009752573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:14,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:14,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-19 07:33:14,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240538972] [2022-03-19 07:33:14,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240538972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:14,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:14,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:33:14,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050810287] [2022-03-19 07:33:14,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:14,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:33:14,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:33:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:33:14,257 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:14,321 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-19 07:33:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:33:14,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 07:33:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:14,322 INFO L225 Difference]: With dead ends: 32 [2022-03-19 07:33:14,322 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 07:33:14,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-19 07:33:14,323 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:14,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 07:33:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-03-19 07:33:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-19 07:33:14,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2022-03-19 07:33:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:14,327 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-19 07:33:14,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-19 07:33:14,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 07:33:14,328 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:14,328 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:14,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:14,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:14,542 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 5 times [2022-03-19 07:33:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:14,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [152272856] [2022-03-19 07:33:14,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:14,544 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 6 times [2022-03-19 07:33:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:14,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093426280] [2022-03-19 07:33:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:14,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:14,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093426280] [2022-03-19 07:33:14,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093426280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:14,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97692916] [2022-03-19 07:33:14,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:14,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:14,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:14,583 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:14,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 07:33:14,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:33:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:33:14,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:33:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97692916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:14,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:14,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-19 07:33:14,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [152272856] [2022-03-19 07:33:14,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [152272856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:14,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:14,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:33:14,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120070526] [2022-03-19 07:33:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:14,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:33:14,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:33:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:33:14,772 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:14,825 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-03-19 07:33:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:33:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-19 07:33:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:14,826 INFO L225 Difference]: With dead ends: 47 [2022-03-19 07:33:14,826 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:33:14,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:33:14,827 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:14,827 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:33:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-03-19 07:33:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-19 07:33:14,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-03-19 07:33:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:14,831 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-19 07:33:14,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-19 07:33:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 07:33:14,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:14,832 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:14,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:15,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:15,045 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 7 times [2022-03-19 07:33:15,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:15,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163904278] [2022-03-19 07:33:15,048 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:15,048 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 8 times [2022-03-19 07:33:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:15,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433261967] [2022-03-19 07:33:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:15,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433261967] [2022-03-19 07:33:15,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433261967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033585304] [2022-03-19 07:33:15,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:15,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:15,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:15,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 07:33:15,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:15,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 07:33:15,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 07:33:15,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033585304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:15,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:15,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-19 07:33:15,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:15,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163904278] [2022-03-19 07:33:15,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163904278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:15,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:15,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:33:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485105070] [2022-03-19 07:33:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:15,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:33:15,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:33:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-19 07:33:15,252 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:15,314 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-19 07:33:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:33:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-19 07:33:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:15,315 INFO L225 Difference]: With dead ends: 53 [2022-03-19 07:33:15,315 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 07:33:15,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:33:15,316 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:15,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 21 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 07:33:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-03-19 07:33:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-19 07:33:15,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-03-19 07:33:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:15,321 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-19 07:33:15,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-19 07:33:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 07:33:15,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:15,322 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:15,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 07:33:15,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:15,539 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:15,539 INFO L85 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 9 times [2022-03-19 07:33:15,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:15,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377547758] [2022-03-19 07:33:15,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:15,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:15,541 INFO L85 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 10 times [2022-03-19 07:33:15,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:15,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240564024] [2022-03-19 07:33:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:15,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:15,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240564024] [2022-03-19 07:33:15,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240564024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967975724] [2022-03-19 07:33:15,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:15,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:15,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:15,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:15,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 07:33:15,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:15,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:15,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:15,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967975724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:15,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:15,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 07:33:15,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377547758] [2022-03-19 07:33:15,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377547758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:15,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:15,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:33:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650998224] [2022-03-19 07:33:15,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:15,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:33:15,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:33:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-19 07:33:15,749 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:15,826 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-19 07:33:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:33:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 07:33:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:15,827 INFO L225 Difference]: With dead ends: 59 [2022-03-19 07:33:15,827 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 07:33:15,827 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:33:15,828 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:15,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 36 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:33:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 07:33:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-19 07:33:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-19 07:33:15,836 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-03-19 07:33:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:15,837 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-19 07:33:15,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-19 07:33:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 07:33:15,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:15,840 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:15,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:16,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:16,060 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 11 times [2022-03-19 07:33:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [375371132] [2022-03-19 07:33:16,062 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:16,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 12 times [2022-03-19 07:33:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343034279] [2022-03-19 07:33:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:16,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343034279] [2022-03-19 07:33:16,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343034279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124524430] [2022-03-19 07:33:16,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:16,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:16,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:16,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 07:33:16,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:16,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 07:33:16,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 07:33:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124524430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:16,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-19 07:33:16,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [375371132] [2022-03-19 07:33:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [375371132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:16,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:33:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578221610] [2022-03-19 07:33:16,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:16,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:33:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:33:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:33:16,344 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:16,451 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-03-19 07:33:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:33:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 07:33:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:16,452 INFO L225 Difference]: With dead ends: 65 [2022-03-19 07:33:16,452 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 07:33:16,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:33:16,453 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:16,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 07:33:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2022-03-19 07:33:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-03-19 07:33:16,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-03-19 07:33:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:16,458 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-03-19 07:33:16,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-03-19 07:33:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 07:33:16,459 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:16,459 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:16,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:16,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:16,693 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 13 times [2022-03-19 07:33:16,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:16,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684495344] [2022-03-19 07:33:16,695 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:16,695 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 14 times [2022-03-19 07:33:16,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:16,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590499] [2022-03-19 07:33:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:16,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:16,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:16,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590499] [2022-03-19 07:33:16,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250691905] [2022-03-19 07:33:16,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:16,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:16,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:16,761 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:16,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 07:33:16,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 07:33:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:16,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:17,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250691905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:17,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:17,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 07:33:17,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:17,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684495344] [2022-03-19 07:33:17,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684495344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:17,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:17,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:33:17,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930164465] [2022-03-19 07:33:17,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:17,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:33:17,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:33:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:33:17,006 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:17,109 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-03-19 07:33:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:33:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-19 07:33:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:17,110 INFO L225 Difference]: With dead ends: 71 [2022-03-19 07:33:17,110 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 07:33:17,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:33:17,110 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:17,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 26 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 07:33:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-03-19 07:33:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-03-19 07:33:17,116 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-03-19 07:33:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:17,116 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-03-19 07:33:17,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-03-19 07:33:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 07:33:17,116 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:17,116 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:17,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:17,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 07:33:17,350 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 15 times [2022-03-19 07:33:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [506197316] [2022-03-19 07:33:17,351 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:17,351 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 16 times [2022-03-19 07:33:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:17,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281754166] [2022-03-19 07:33:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:17,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281754166] [2022-03-19 07:33:17,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281754166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231555821] [2022-03-19 07:33:17,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:17,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:17,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:17,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 07:33:17,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 07:33:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:17,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:17,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231555821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:17,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:17,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-19 07:33:17,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:17,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [506197316] [2022-03-19 07:33:17,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [506197316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:17,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:17,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:33:17,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260465509] [2022-03-19 07:33:17,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:17,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:33:17,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:33:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:33:17,626 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:17,741 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-19 07:33:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:33:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-19 07:33:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:17,742 INFO L225 Difference]: With dead ends: 77 [2022-03-19 07:33:17,742 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 07:33:17,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:33:17,743 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:17,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 26 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 07:33:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-03-19 07:33:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-19 07:33:17,748 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-03-19 07:33:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:17,749 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-19 07:33:17,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-19 07:33:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 07:33:17,749 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:17,749 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:17,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:17,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:17,965 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:17,966 INFO L85 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 17 times [2022-03-19 07:33:17,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:17,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [978607576] [2022-03-19 07:33:17,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:17,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 18 times [2022-03-19 07:33:17,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:17,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366686729] [2022-03-19 07:33:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:17,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:18,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:18,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366686729] [2022-03-19 07:33:18,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366686729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:18,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679085366] [2022-03-19 07:33:18,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:18,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:18,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:18,051 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:18,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 07:33:18,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:18,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 07:33:18,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 07:33:18,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679085366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:18,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:18,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-03-19 07:33:18,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [978607576] [2022-03-19 07:33:18,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [978607576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:18,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:18,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:33:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814992310] [2022-03-19 07:33:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:18,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:33:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:33:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:33:18,225 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:18,357 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-03-19 07:33:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:33:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 07:33:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:18,358 INFO L225 Difference]: With dead ends: 83 [2022-03-19 07:33:18,358 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 07:33:18,358 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:33:18,359 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:18,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 26 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 07:33:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2022-03-19 07:33:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-19 07:33:18,364 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-03-19 07:33:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:18,364 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-19 07:33:18,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-19 07:33:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 07:33:18,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:18,364 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:18,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:18,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 07:33:18,574 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 19 times [2022-03-19 07:33:18,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:18,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068622310] [2022-03-19 07:33:18,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:18,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 20 times [2022-03-19 07:33:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:18,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402709649] [2022-03-19 07:33:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:18,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:18,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:18,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:18,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402709649] [2022-03-19 07:33:18,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402709649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:18,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343304942] [2022-03-19 07:33:18,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:18,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:18,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:18,693 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:18,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 07:33:18,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 07:33:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:18,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343304942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:19,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-19 07:33:19,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068622310] [2022-03-19 07:33:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068622310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:19,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:33:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409026608] [2022-03-19 07:33:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:19,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:33:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:33:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:33:19,112 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:19,310 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-03-19 07:33:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:33:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 07:33:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:19,311 INFO L225 Difference]: With dead ends: 89 [2022-03-19 07:33:19,311 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 07:33:19,311 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:33:19,313 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:19,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 26 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 07:33:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2022-03-19 07:33:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-19 07:33:19,322 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2022-03-19 07:33:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:19,322 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-19 07:33:19,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-19 07:33:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 07:33:19,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:19,322 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:19,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 07:33:19,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 07:33:19,553 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 21 times [2022-03-19 07:33:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1656802453] [2022-03-19 07:33:19,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:19,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 22 times [2022-03-19 07:33:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703322499] [2022-03-19 07:33:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:19,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:19,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703322499] [2022-03-19 07:33:19,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703322499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543478563] [2022-03-19 07:33:19,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:19,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:19,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 07:33:19,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:19,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:19,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:33:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:19,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:19,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543478563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:19,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:19,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 07:33:19,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:19,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1656802453] [2022-03-19 07:33:19,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1656802453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:19,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:19,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:33:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868689252] [2022-03-19 07:33:19,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:19,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:33:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:33:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:33:19,959 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:20,146 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-03-19 07:33:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:33:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-19 07:33:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:20,147 INFO L225 Difference]: With dead ends: 95 [2022-03-19 07:33:20,147 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 07:33:20,148 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:33:20,148 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:20,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 41 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 07:33:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2022-03-19 07:33:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-19 07:33:20,154 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2022-03-19 07:33:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:20,154 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-19 07:33:20,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-19 07:33:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 07:33:20,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:20,155 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:20,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:20,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 07:33:20,371 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 23 times [2022-03-19 07:33:20,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:20,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1844182551] [2022-03-19 07:33:20,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:20,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 24 times [2022-03-19 07:33:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042523143] [2022-03-19 07:33:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:20,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:20,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:20,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042523143] [2022-03-19 07:33:20,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042523143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:20,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117306296] [2022-03-19 07:33:20,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:20,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:20,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:20,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:20,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 07:33:20,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-19 07:33:20,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-19 07:33:20,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117306296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:20,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:20,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-03-19 07:33:20,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1844182551] [2022-03-19 07:33:20,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1844182551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:20,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:20,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:33:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530308529] [2022-03-19 07:33:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:20,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:33:20,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:33:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:33:20,665 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:20,857 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-03-19 07:33:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:33:20,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-19 07:33:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:20,858 INFO L225 Difference]: With dead ends: 101 [2022-03-19 07:33:20,858 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 07:33:20,860 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:33:20,861 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:20,861 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 07:33:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2022-03-19 07:33:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-19 07:33:20,869 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-03-19 07:33:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:20,870 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-19 07:33:20,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-19 07:33:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 07:33:20,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:20,871 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:20,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:21,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 07:33:21,092 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 25 times [2022-03-19 07:33:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:21,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651620100] [2022-03-19 07:33:21,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:21,094 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 26 times [2022-03-19 07:33:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:21,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293427041] [2022-03-19 07:33:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:21,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:21,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:21,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293427041] [2022-03-19 07:33:21,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293427041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:21,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116354639] [2022-03-19 07:33:21,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:21,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:21,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:21,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:21,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 07:33:21,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:21,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:21,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 07:33:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:21,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116354639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:21,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:21,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-19 07:33:21,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651620100] [2022-03-19 07:33:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651620100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:21,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:21,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:33:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082307006] [2022-03-19 07:33:21,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:21,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:33:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:33:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:33:21,612 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:21,863 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-03-19 07:33:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:33:21,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-19 07:33:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:21,864 INFO L225 Difference]: With dead ends: 107 [2022-03-19 07:33:21,864 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 07:33:21,864 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 07:33:21,865 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 156 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:21,865 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 31 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 07:33:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2022-03-19 07:33:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-19 07:33:21,877 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-03-19 07:33:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:21,877 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-19 07:33:21,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-19 07:33:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 07:33:21,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:21,878 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:21,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:22,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:22,095 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 27 times [2022-03-19 07:33:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994389275] [2022-03-19 07:33:22,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:22,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:22,097 INFO L85 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 28 times [2022-03-19 07:33:22,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:22,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021474772] [2022-03-19 07:33:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:22,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021474772] [2022-03-19 07:33:22,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021474772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846938805] [2022-03-19 07:33:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:22,266 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:22,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 07:33:22,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:33:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:22,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:22,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846938805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:22,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:22,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-19 07:33:22,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:22,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994389275] [2022-03-19 07:33:22,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994389275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:22,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:22,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:33:22,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041786166] [2022-03-19 07:33:22,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:22,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:33:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:33:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:33:22,690 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:22,940 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2022-03-19 07:33:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:33:22,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-19 07:33:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:22,941 INFO L225 Difference]: With dead ends: 113 [2022-03-19 07:33:22,941 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 07:33:22,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:33:22,942 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:22,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 36 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 07:33:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2022-03-19 07:33:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-19 07:33:22,949 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2022-03-19 07:33:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:22,949 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-19 07:33:22,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-19 07:33:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 07:33:22,950 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:22,950 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:22,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:23,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 07:33:23,167 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:23,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 29 times [2022-03-19 07:33:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:23,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333243820] [2022-03-19 07:33:23,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:23,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 30 times [2022-03-19 07:33:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84520219] [2022-03-19 07:33:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:23,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84520219] [2022-03-19 07:33:23,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84520219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591627244] [2022-03-19 07:33:23,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:23,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:23,295 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 07:33:23,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 07:33:23,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 07:33:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591627244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:23,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-03-19 07:33:23,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:23,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333243820] [2022-03-19 07:33:23,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333243820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:23,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:23,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:33:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749799022] [2022-03-19 07:33:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:23,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:33:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:33:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:33:23,555 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:23,866 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2022-03-19 07:33:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 07:33:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-19 07:33:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:23,867 INFO L225 Difference]: With dead ends: 119 [2022-03-19 07:33:23,867 INFO L226 Difference]: Without dead ends: 105 [2022-03-19 07:33:23,868 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:33:23,868 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:23,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 26 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-19 07:33:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2022-03-19 07:33:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-03-19 07:33:23,875 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2022-03-19 07:33:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:23,875 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-03-19 07:33:23,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-03-19 07:33:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 07:33:23,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:23,875 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:23,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:24,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 07:33:24,092 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 31 times [2022-03-19 07:33:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:24,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265877428] [2022-03-19 07:33:24,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:24,094 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 32 times [2022-03-19 07:33:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:24,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252893900] [2022-03-19 07:33:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:24,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252893900] [2022-03-19 07:33:24,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252893900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024461895] [2022-03-19 07:33:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:24,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:24,300 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:24,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 07:33:24,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 07:33:24,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:24,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:24,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024461895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:24,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:24,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-19 07:33:24,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265877428] [2022-03-19 07:33:24,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265877428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:24,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:24,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 07:33:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898215424] [2022-03-19 07:33:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:24,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 07:33:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 07:33:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:33:24,788 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:25,098 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2022-03-19 07:33:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 07:33:25,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-19 07:33:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:25,099 INFO L225 Difference]: With dead ends: 125 [2022-03-19 07:33:25,099 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 07:33:25,100 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:33:25,100 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:25,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 56 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 07:33:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2022-03-19 07:33:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-03-19 07:33:25,108 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-03-19 07:33:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:25,108 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-03-19 07:33:25,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-03-19 07:33:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 07:33:25,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:25,108 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:25,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 07:33:25,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:25,324 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 33 times [2022-03-19 07:33:25,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:25,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389836001] [2022-03-19 07:33:25,325 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:25,325 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 34 times [2022-03-19 07:33:25,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593087498] [2022-03-19 07:33:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:25,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:25,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:25,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593087498] [2022-03-19 07:33:25,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593087498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:25,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991709895] [2022-03-19 07:33:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:25,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:25,488 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:25,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 07:33:25,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 07:33:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:25,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:26,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991709895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:26,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:26,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-19 07:33:26,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:26,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389836001] [2022-03-19 07:33:26,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389836001] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:26,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:26,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:33:26,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201549081] [2022-03-19 07:33:26,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:26,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:33:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:33:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:33:26,108 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:26,586 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-03-19 07:33:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 07:33:26,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-19 07:33:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:26,587 INFO L225 Difference]: With dead ends: 131 [2022-03-19 07:33:26,587 INFO L226 Difference]: Without dead ends: 117 [2022-03-19 07:33:26,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 07:33:26,604 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:26,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 36 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-19 07:33:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2022-03-19 07:33:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-19 07:33:26,612 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-03-19 07:33:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:26,612 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-19 07:33:26,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-19 07:33:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 07:33:26,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:26,613 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:26,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:26,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:26,830 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 35 times [2022-03-19 07:33:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1743374640] [2022-03-19 07:33:26,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:26,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 36 times [2022-03-19 07:33:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:26,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441163567] [2022-03-19 07:33:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:26,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:26,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:27,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441163567] [2022-03-19 07:33:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441163567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404827519] [2022-03-19 07:33:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:27,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:27,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:27,003 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:27,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 07:33:27,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:27,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 07:33:27,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 07:33:27,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404827519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:27,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:27,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-03-19 07:33:27,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1743374640] [2022-03-19 07:33:27,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1743374640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:27,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:27,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 07:33:27,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824650038] [2022-03-19 07:33:27,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:27,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 07:33:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 07:33:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:33:27,297 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:27,742 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-03-19 07:33:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 07:33:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-19 07:33:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:27,745 INFO L225 Difference]: With dead ends: 137 [2022-03-19 07:33:27,746 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 07:33:27,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:33:27,748 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 204 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:27,749 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 46 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 07:33:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 57. [2022-03-19 07:33:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-19 07:33:27,778 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-03-19 07:33:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:27,778 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-19 07:33:27,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-19 07:33:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 07:33:27,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:27,778 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:27,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:27,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:27,995 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 37 times [2022-03-19 07:33:27,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:27,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721187258] [2022-03-19 07:33:27,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:27,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 38 times [2022-03-19 07:33:27,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:27,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137143409] [2022-03-19 07:33:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:27,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:28,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:28,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137143409] [2022-03-19 07:33:28,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137143409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393043242] [2022-03-19 07:33:28,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:28,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:28,280 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:28,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 07:33:28,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:28,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 07:33:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:28,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:29,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393043242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:29,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:29,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-19 07:33:29,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721187258] [2022-03-19 07:33:29,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721187258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:29,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:29,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 07:33:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990826261] [2022-03-19 07:33:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:29,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 07:33:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 07:33:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:33:29,080 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:29,478 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2022-03-19 07:33:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 07:33:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-19 07:33:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:29,479 INFO L225 Difference]: With dead ends: 143 [2022-03-19 07:33:29,479 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 07:33:29,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 07:33:29,484 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:29,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 31 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 07:33:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2022-03-19 07:33:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-19 07:33:29,493 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-03-19 07:33:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:29,493 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-19 07:33:29,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-19 07:33:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 07:33:29,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:29,494 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:29,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:29,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 07:33:29,708 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 39 times [2022-03-19 07:33:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197896548] [2022-03-19 07:33:29,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:29,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 40 times [2022-03-19 07:33:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:29,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510098922] [2022-03-19 07:33:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:29,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:29,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510098922] [2022-03-19 07:33:29,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510098922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:29,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4546924] [2022-03-19 07:33:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:29,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:29,936 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:29,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 07:33:30,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 07:33:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:30,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4546924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:30,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:30,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-19 07:33:30,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:30,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197896548] [2022-03-19 07:33:30,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197896548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:30,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:30,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 07:33:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626785246] [2022-03-19 07:33:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:30,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 07:33:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 07:33:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:33:30,605 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:31,011 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2022-03-19 07:33:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 07:33:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-19 07:33:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:31,012 INFO L225 Difference]: With dead ends: 149 [2022-03-19 07:33:31,012 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 07:33:31,013 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 07:33:31,014 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 290 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:31,014 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 36 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 07:33:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-03-19 07:33:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-19 07:33:31,024 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-03-19 07:33:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:31,024 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-19 07:33:31,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-19 07:33:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 07:33:31,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:31,024 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:31,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:31,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-19 07:33:31,239 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 41 times [2022-03-19 07:33:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:31,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274968493] [2022-03-19 07:33:31,240 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:31,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 42 times [2022-03-19 07:33:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:31,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688554605] [2022-03-19 07:33:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:31,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:31,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:31,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688554605] [2022-03-19 07:33:31,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688554605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:31,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25019019] [2022-03-19 07:33:31,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:31,455 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:31,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 07:33:31,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:31,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 07:33:31,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 07:33:31,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25019019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:31,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:31,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-03-19 07:33:31,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274968493] [2022-03-19 07:33:31,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274968493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:31,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:31,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:33:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754834804] [2022-03-19 07:33:31,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:31,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:33:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:33:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:33:31,737 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:32,273 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2022-03-19 07:33:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 07:33:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-19 07:33:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:32,274 INFO L225 Difference]: With dead ends: 155 [2022-03-19 07:33:32,274 INFO L226 Difference]: Without dead ends: 141 [2022-03-19 07:33:32,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:33:32,275 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:32,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 26 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-19 07:33:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2022-03-19 07:33:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-03-19 07:33:32,287 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-03-19 07:33:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:32,287 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-03-19 07:33:32,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-03-19 07:33:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 07:33:32,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:32,288 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:32,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 07:33:32,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:32,499 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 43 times [2022-03-19 07:33:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:32,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64612571] [2022-03-19 07:33:32,500 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:32,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 44 times [2022-03-19 07:33:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414911799] [2022-03-19 07:33:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:32,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:32,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414911799] [2022-03-19 07:33:32,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414911799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713979855] [2022-03-19 07:33:32,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:32,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:32,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:32,743 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:32,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 07:33:32,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:32,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:32,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 07:33:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:32,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:33,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713979855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:33,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:33,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-19 07:33:33,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:33,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64612571] [2022-03-19 07:33:33,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64612571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:33,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:33,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 07:33:33,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678908686] [2022-03-19 07:33:33,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:33,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 07:33:33,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:33,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 07:33:33,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:33:33,411 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:33,891 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2022-03-19 07:33:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:33:33,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-19 07:33:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:33,892 INFO L225 Difference]: With dead ends: 161 [2022-03-19 07:33:33,892 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 07:33:33,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 07:33:33,894 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:33,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 41 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 07:33:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 65. [2022-03-19 07:33:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-19 07:33:33,905 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-03-19 07:33:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:33,906 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-19 07:33:33,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-19 07:33:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 07:33:33,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:33,906 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:33,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:34,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:34,124 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 45 times [2022-03-19 07:33:34,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:34,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596099210] [2022-03-19 07:33:34,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:34,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 46 times [2022-03-19 07:33:34,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:34,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347440470] [2022-03-19 07:33:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:34,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:34,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347440470] [2022-03-19 07:33:34,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347440470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575187031] [2022-03-19 07:33:34,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:34,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:34,379 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:34,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 07:33:34,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 07:33:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:34,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575187031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:35,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:35,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 07:33:35,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:35,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596099210] [2022-03-19 07:33:35,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596099210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:35,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:35,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:33:35,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501464961] [2022-03-19 07:33:35,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:35,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:33:35,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:35,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:33:35,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:33:35,158 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:35,733 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2022-03-19 07:33:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 07:33:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-19 07:33:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:35,734 INFO L225 Difference]: With dead ends: 167 [2022-03-19 07:33:35,734 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 07:33:35,735 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 07:33:35,736 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 330 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:35,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 36 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 07:33:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 67. [2022-03-19 07:33:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-19 07:33:35,749 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-03-19 07:33:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:35,749 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-19 07:33:35,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-19 07:33:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 07:33:35,749 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:35,749 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:35,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 07:33:35,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 07:33:35,954 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 47 times [2022-03-19 07:33:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:35,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1292942968] [2022-03-19 07:33:35,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:35,956 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:35,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 48 times [2022-03-19 07:33:35,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:35,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667496257] [2022-03-19 07:33:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:35,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:36,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:36,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:36,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667496257] [2022-03-19 07:33:36,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667496257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:36,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317179935] [2022-03-19 07:33:36,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:36,260 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:36,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 07:33:36,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:36,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-19 07:33:36,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-19 07:33:36,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317179935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:36,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:36,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-03-19 07:33:36,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:36,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1292942968] [2022-03-19 07:33:36,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1292942968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:36,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:36,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 07:33:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642981309] [2022-03-19 07:33:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:36,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 07:33:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 07:33:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:33:36,603 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:37,247 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2022-03-19 07:33:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 07:33:37,248 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-19 07:33:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:37,249 INFO L225 Difference]: With dead ends: 173 [2022-03-19 07:33:37,249 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 07:33:37,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:33:37,250 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:37,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 07:33:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 69. [2022-03-19 07:33:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-19 07:33:37,263 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-03-19 07:33:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:37,263 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-19 07:33:37,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-19 07:33:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:33:37,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:37,264 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:37,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:37,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 07:33:37,481 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 49 times [2022-03-19 07:33:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:37,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120720601] [2022-03-19 07:33:37,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:37,483 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 50 times [2022-03-19 07:33:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:37,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768272583] [2022-03-19 07:33:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:37,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:37,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:37,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768272583] [2022-03-19 07:33:37,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768272583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:37,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682357362] [2022-03-19 07:33:37,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:37,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:37,768 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:37,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 07:33:37,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:37,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:37,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 07:33:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:37,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:38,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682357362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:38,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:38,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-19 07:33:38,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120720601] [2022-03-19 07:33:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120720601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:38,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 07:33:38,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553418126] [2022-03-19 07:33:38,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:38,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 07:33:38,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 07:33:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:33:38,613 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:39,222 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2022-03-19 07:33:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 07:33:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:33:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:39,223 INFO L225 Difference]: With dead ends: 179 [2022-03-19 07:33:39,223 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 07:33:39,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 07:33:39,224 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 323 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:39,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 41 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 07:33:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2022-03-19 07:33:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-19 07:33:39,250 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-03-19 07:33:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:39,250 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-19 07:33:39,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-19 07:33:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 07:33:39,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:39,263 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:39,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 07:33:39,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 07:33:39,464 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 51 times [2022-03-19 07:33:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:39,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074675754] [2022-03-19 07:33:39,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:39,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 52 times [2022-03-19 07:33:39,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:39,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681263068] [2022-03-19 07:33:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:39,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:39,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:39,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681263068] [2022-03-19 07:33:39,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681263068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:39,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466883755] [2022-03-19 07:33:39,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:39,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:39,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:39,746 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:39,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 07:33:39,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 07:33:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:39,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:40,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466883755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:40,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:40,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-19 07:33:40,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:40,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074675754] [2022-03-19 07:33:40,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074675754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:40,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:40,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 07:33:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301820654] [2022-03-19 07:33:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:40,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 07:33:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 07:33:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 07:33:40,575 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:41,218 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2022-03-19 07:33:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 07:33:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-19 07:33:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:41,219 INFO L225 Difference]: With dead ends: 185 [2022-03-19 07:33:41,219 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 07:33:41,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 07:33:41,220 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 327 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:41,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 41 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 07:33:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 73. [2022-03-19 07:33:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-03-19 07:33:41,235 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-03-19 07:33:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:41,236 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-03-19 07:33:41,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-03-19 07:33:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 07:33:41,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:41,236 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:41,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 07:33:41,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 07:33:41,450 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 53 times [2022-03-19 07:33:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:41,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151976736] [2022-03-19 07:33:41,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:41,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:41,451 INFO L85 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 54 times [2022-03-19 07:33:41,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:41,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929681202] [2022-03-19 07:33:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:41,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:41,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929681202] [2022-03-19 07:33:41,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929681202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:41,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769822095] [2022-03-19 07:33:41,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:41,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:41,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:41,763 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:41,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 07:33:41,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-19 07:33:41,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-19 07:33:42,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769822095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:42,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:42,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-03-19 07:33:42,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151976736] [2022-03-19 07:33:42,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151976736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:42,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:42,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 07:33:42,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106369654] [2022-03-19 07:33:42,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:42,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 07:33:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 07:33:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:33:42,100 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:42,749 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2022-03-19 07:33:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 07:33:42,749 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-19 07:33:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:42,750 INFO L225 Difference]: With dead ends: 191 [2022-03-19 07:33:42,750 INFO L226 Difference]: Without dead ends: 177 [2022-03-19 07:33:42,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1426, Invalid=2480, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 07:33:42,751 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 407 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:42,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 21 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-19 07:33:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-03-19 07:33:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-03-19 07:33:42,767 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-03-19 07:33:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:42,768 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-03-19 07:33:42,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-03-19 07:33:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 07:33:42,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:42,768 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:42,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 07:33:42,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:42,985 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 55 times [2022-03-19 07:33:42,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:42,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133632555] [2022-03-19 07:33:42,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:42,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:42,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 56 times [2022-03-19 07:33:42,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:42,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50471967] [2022-03-19 07:33:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:42,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:43,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:43,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50471967] [2022-03-19 07:33:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50471967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899104421] [2022-03-19 07:33:43,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:43,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:43,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:43,244 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:43,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 07:33:43,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 07:33:43,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:43,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:44,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899104421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:44,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:44,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-19 07:33:44,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133632555] [2022-03-19 07:33:44,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133632555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:44,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:44,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 07:33:44,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438975021] [2022-03-19 07:33:44,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:44,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 07:33:44,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 07:33:44,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 07:33:44,040 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:44,715 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2022-03-19 07:33:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 07:33:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-19 07:33:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:44,716 INFO L225 Difference]: With dead ends: 197 [2022-03-19 07:33:44,716 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 07:33:44,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 07:33:44,717 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:44,717 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 46 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 07:33:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 77. [2022-03-19 07:33:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-19 07:33:44,734 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-03-19 07:33:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:44,734 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-19 07:33:44,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-19 07:33:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 07:33:44,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:44,735 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:44,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:44,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:44,939 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 57 times [2022-03-19 07:33:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:44,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949074553] [2022-03-19 07:33:44,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:44,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 58 times [2022-03-19 07:33:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:44,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146995501] [2022-03-19 07:33:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:45,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146995501] [2022-03-19 07:33:45,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146995501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573231481] [2022-03-19 07:33:45,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:45,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:45,316 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:45,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 07:33:45,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:45,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 07:33:45,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:45,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573231481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:46,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:46,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-19 07:33:46,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949074553] [2022-03-19 07:33:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949074553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:46,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:46,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 07:33:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165737214] [2022-03-19 07:33:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:46,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 07:33:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 07:33:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 07:33:46,234 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:46,958 INFO L93 Difference]: Finished difference Result 203 states and 232 transitions. [2022-03-19 07:33:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 07:33:46,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-19 07:33:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:46,960 INFO L225 Difference]: With dead ends: 203 [2022-03-19 07:33:46,960 INFO L226 Difference]: Without dead ends: 189 [2022-03-19 07:33:46,960 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 07:33:46,961 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 361 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:46,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 51 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-19 07:33:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 79. [2022-03-19 07:33:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-19 07:33:46,980 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-03-19 07:33:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:46,980 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-19 07:33:46,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-19 07:33:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 07:33:46,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:46,981 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:46,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 07:33:47,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-19 07:33:47,188 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 59 times [2022-03-19 07:33:47,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:47,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082660425] [2022-03-19 07:33:47,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:47,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:47,190 INFO L85 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 60 times [2022-03-19 07:33:47,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:47,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391561683] [2022-03-19 07:33:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:47,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:47,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391561683] [2022-03-19 07:33:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391561683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583139572] [2022-03-19 07:33:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:47,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:47,518 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:47,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 07:33:47,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 07:33:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-19 07:33:47,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583139572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:47,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:47,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-03-19 07:33:47,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082660425] [2022-03-19 07:33:47,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082660425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:47,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:47,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 07:33:47,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464029280] [2022-03-19 07:33:47,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:47,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 07:33:47,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 07:33:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:33:47,930 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:48,797 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2022-03-19 07:33:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 07:33:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-19 07:33:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:48,798 INFO L225 Difference]: With dead ends: 209 [2022-03-19 07:33:48,798 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 07:33:48,798 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 07:33:48,799 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 428 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:48,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 36 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 07:33:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 81. [2022-03-19 07:33:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-03-19 07:33:48,818 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-03-19 07:33:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:48,818 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-03-19 07:33:48,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-03-19 07:33:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 07:33:48,819 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:48,819 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:48,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:49,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:49,028 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 61 times [2022-03-19 07:33:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373124596] [2022-03-19 07:33:49,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:49,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:49,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 62 times [2022-03-19 07:33:49,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:49,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395007386] [2022-03-19 07:33:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:49,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:49,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:49,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395007386] [2022-03-19 07:33:49,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395007386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117879115] [2022-03-19 07:33:49,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:49,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:49,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:49,425 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:49,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 07:33:49,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:49,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 07:33:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:49,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:50,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117879115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:50,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:50,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-19 07:33:50,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373124596] [2022-03-19 07:33:50,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373124596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:50,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:50,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 07:33:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434373790] [2022-03-19 07:33:50,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:50,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 07:33:50,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 07:33:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 07:33:50,479 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:51,427 INFO L93 Difference]: Finished difference Result 215 states and 246 transitions. [2022-03-19 07:33:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 07:33:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-19 07:33:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:51,428 INFO L225 Difference]: With dead ends: 215 [2022-03-19 07:33:51,428 INFO L226 Difference]: Without dead ends: 201 [2022-03-19 07:33:51,429 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 07:33:51,429 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 463 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:51,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 26 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:51,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-19 07:33:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 83. [2022-03-19 07:33:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-03-19 07:33:51,457 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-03-19 07:33:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:51,457 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-03-19 07:33:51,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-03-19 07:33:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 07:33:51,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:51,458 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:51,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:51,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:51,671 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 63 times [2022-03-19 07:33:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1174185732] [2022-03-19 07:33:51,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:51,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 64 times [2022-03-19 07:33:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:51,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882156726] [2022-03-19 07:33:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:51,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:52,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:52,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:52,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882156726] [2022-03-19 07:33:52,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882156726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263270700] [2022-03-19 07:33:52,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:52,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:52,076 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:52,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 07:33:52,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 07:33:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:52,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263270700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:53,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:53,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-19 07:33:53,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1174185732] [2022-03-19 07:33:53,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1174185732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:53,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:53,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 07:33:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393008804] [2022-03-19 07:33:53,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:53,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 07:33:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 07:33:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 07:33:53,057 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:53,955 INFO L93 Difference]: Finished difference Result 221 states and 253 transitions. [2022-03-19 07:33:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 07:33:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-19 07:33:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:53,956 INFO L225 Difference]: With dead ends: 221 [2022-03-19 07:33:53,956 INFO L226 Difference]: Without dead ends: 207 [2022-03-19 07:33:53,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 07:33:53,957 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 430 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:53,957 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 51 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:33:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-19 07:33:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 85. [2022-03-19 07:33:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-03-19 07:33:53,980 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-03-19 07:33:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:53,981 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-03-19 07:33:53,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-03-19 07:33:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 07:33:53,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:53,981 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:54,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 07:33:54,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 07:33:54,199 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 65 times [2022-03-19 07:33:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610176907] [2022-03-19 07:33:54,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:54,201 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 66 times [2022-03-19 07:33:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:54,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944262886] [2022-03-19 07:33:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:54,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:54,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:54,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944262886] [2022-03-19 07:33:54,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944262886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:54,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954390873] [2022-03-19 07:33:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:54,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:54,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:54,616 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:54,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 07:33:54,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:33:54,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:33:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-19 07:33:54,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-19 07:33:54,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954390873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:54,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-03-19 07:33:54,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610176907] [2022-03-19 07:33:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610176907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:54,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 07:33:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115891935] [2022-03-19 07:33:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:54,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 07:33:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 07:33:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 07:33:54,992 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:55,962 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2022-03-19 07:33:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 07:33:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-19 07:33:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:55,963 INFO L225 Difference]: With dead ends: 227 [2022-03-19 07:33:55,963 INFO L226 Difference]: Without dead ends: 213 [2022-03-19 07:33:55,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 07:33:55,964 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 490 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:55,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 31 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-19 07:33:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 87. [2022-03-19 07:33:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-19 07:33:55,987 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-03-19 07:33:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:55,988 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-19 07:33:55,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-19 07:33:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 07:33:55,988 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:55,988 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:56,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 07:33:56,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 07:33:56,202 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 67 times [2022-03-19 07:33:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218557956] [2022-03-19 07:33:56,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:56,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 68 times [2022-03-19 07:33:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:56,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054998655] [2022-03-19 07:33:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:56,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:56,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054998655] [2022-03-19 07:33:56,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054998655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418797352] [2022-03-19 07:33:56,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:56,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:56,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:56,654 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:56,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 07:33:56,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:56,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:56,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 07:33:56,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:58,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418797352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:58,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:58,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-19 07:33:58,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218557956] [2022-03-19 07:33:58,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218557956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:58,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:58,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 07:33:58,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407370896] [2022-03-19 07:33:58,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:58,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 07:33:58,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 07:33:58,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 07:33:58,185 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:59,249 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2022-03-19 07:33:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 07:33:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-19 07:33:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:59,250 INFO L225 Difference]: With dead ends: 233 [2022-03-19 07:33:59,250 INFO L226 Difference]: Without dead ends: 219 [2022-03-19 07:33:59,250 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 07:33:59,251 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 494 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:59,251 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 36 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-19 07:33:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 89. [2022-03-19 07:33:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-19 07:33:59,275 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2022-03-19 07:33:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:59,275 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-19 07:33:59,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-19 07:33:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-19 07:33:59,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:59,276 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:59,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 07:33:59,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 07:33:59,488 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 69 times [2022-03-19 07:33:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:59,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240443207] [2022-03-19 07:33:59,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:59,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 70 times [2022-03-19 07:33:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:59,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242133267] [2022-03-19 07:33:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:33:59,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:59,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242133267] [2022-03-19 07:33:59,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242133267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:59,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805466425] [2022-03-19 07:33:59,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:59,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:59,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:59,834 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:33:59,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 07:33:59,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 07:33:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:00,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:00,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805466425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:00,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:00,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-19 07:34:00,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240443207] [2022-03-19 07:34:00,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240443207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:00,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:00,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 07:34:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722436834] [2022-03-19 07:34:00,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:00,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 07:34:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 07:34:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 07:34:00,881 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:02,069 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2022-03-19 07:34:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 07:34:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-19 07:34:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:02,070 INFO L225 Difference]: With dead ends: 239 [2022-03-19 07:34:02,070 INFO L226 Difference]: Without dead ends: 225 [2022-03-19 07:34:02,071 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 07:34:02,071 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 507 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:02,071 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 36 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:34:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-19 07:34:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 91. [2022-03-19 07:34:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-19 07:34:02,097 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-03-19 07:34:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:02,098 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-19 07:34:02,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-19 07:34:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 07:34:02,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:02,098 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:02,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:02,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:02,311 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 71 times [2022-03-19 07:34:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632688117] [2022-03-19 07:34:02,313 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:02,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 72 times [2022-03-19 07:34:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:02,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16931107] [2022-03-19 07:34:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:02,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:02,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16931107] [2022-03-19 07:34:02,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16931107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235058917] [2022-03-19 07:34:02,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:02,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:02,817 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:02,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 07:34:02,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:34:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:34:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-19 07:34:03,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-19 07:34:03,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235058917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:03,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-03-19 07:34:03,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632688117] [2022-03-19 07:34:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632688117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:03,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:03,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 07:34:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6926046] [2022-03-19 07:34:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:03,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 07:34:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 07:34:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:34:03,289 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:04,409 INFO L93 Difference]: Finished difference Result 245 states and 281 transitions. [2022-03-19 07:34:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 07:34:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-19 07:34:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:04,410 INFO L225 Difference]: With dead ends: 245 [2022-03-19 07:34:04,410 INFO L226 Difference]: Without dead ends: 231 [2022-03-19 07:34:04,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 07:34:04,414 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 575 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:04,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 31 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:34:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-19 07:34:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 93. [2022-03-19 07:34:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-19 07:34:04,443 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2022-03-19 07:34:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:04,443 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-19 07:34:04,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-19 07:34:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 07:34:04,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:04,444 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:04,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:04,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 07:34:04,661 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 73 times [2022-03-19 07:34:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:04,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2535324] [2022-03-19 07:34:04,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:04,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:04,663 INFO L85 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 74 times [2022-03-19 07:34:04,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:04,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287233060] [2022-03-19 07:34:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:04,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:05,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:05,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:05,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287233060] [2022-03-19 07:34:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287233060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925204175] [2022-03-19 07:34:05,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:05,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:05,176 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:05,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 07:34:05,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:05,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 07:34:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:05,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:06,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925204175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:06,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:06,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-19 07:34:06,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:06,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2535324] [2022-03-19 07:34:06,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2535324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:06,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:06,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 07:34:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409409121] [2022-03-19 07:34:06,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:06,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 07:34:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 07:34:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 07:34:06,820 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:08,178 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2022-03-19 07:34:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 07:34:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-19 07:34:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:08,179 INFO L225 Difference]: With dead ends: 251 [2022-03-19 07:34:08,179 INFO L226 Difference]: Without dead ends: 237 [2022-03-19 07:34:08,180 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 07:34:08,180 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 556 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:08,180 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 36 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:34:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-19 07:34:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 95. [2022-03-19 07:34:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-03-19 07:34:08,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-03-19 07:34:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:08,210 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-03-19 07:34:08,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-03-19 07:34:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 07:34:08,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:08,210 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:08,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:08,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 07:34:08,428 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 75 times [2022-03-19 07:34:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:08,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725519062] [2022-03-19 07:34:08,429 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:08,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 76 times [2022-03-19 07:34:08,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:08,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858751755] [2022-03-19 07:34:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:08,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:08,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:08,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:08,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858751755] [2022-03-19 07:34:08,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858751755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:08,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965352116] [2022-03-19 07:34:08,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:34:08,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:08,962 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:08,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 07:34:09,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:34:09,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:09,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:34:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:09,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:10,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965352116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:10,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:10,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-19 07:34:10,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:10,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725519062] [2022-03-19 07:34:10,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725519062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:10,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:10,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 07:34:10,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535921934] [2022-03-19 07:34:10,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:10,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 07:34:10,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 07:34:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 07:34:10,292 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:11,911 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2022-03-19 07:34:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 07:34:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-19 07:34:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:11,912 INFO L225 Difference]: With dead ends: 257 [2022-03-19 07:34:11,912 INFO L226 Difference]: Without dead ends: 243 [2022-03-19 07:34:11,913 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 07:34:11,913 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 849 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:11,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 31 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-19 07:34:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 97. [2022-03-19 07:34:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-19 07:34:11,944 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2022-03-19 07:34:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:11,945 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-19 07:34:11,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-19 07:34:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 07:34:11,945 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:11,945 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:11,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:12,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:12,161 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:12,162 INFO L85 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 77 times [2022-03-19 07:34:12,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:12,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938695307] [2022-03-19 07:34:12,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:12,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:12,163 INFO L85 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 78 times [2022-03-19 07:34:12,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:12,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56362511] [2022-03-19 07:34:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:12,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:12,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:12,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56362511] [2022-03-19 07:34:12,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56362511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377217497] [2022-03-19 07:34:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:12,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:12,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:12,738 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:12,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 07:34:12,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:34:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:34:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-19 07:34:13,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-19 07:34:13,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377217497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:13,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:13,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-03-19 07:34:13,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938695307] [2022-03-19 07:34:13,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938695307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:13,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:13,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 07:34:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997453988] [2022-03-19 07:34:13,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:13,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 07:34:13,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:13,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 07:34:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:34:13,260 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:14,831 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2022-03-19 07:34:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 07:34:14,831 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-19 07:34:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:14,832 INFO L225 Difference]: With dead ends: 263 [2022-03-19 07:34:14,832 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 07:34:14,833 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 07:34:14,833 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 527 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:14,833 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 51 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 07:34:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 99. [2022-03-19 07:34:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-19 07:34:14,866 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2022-03-19 07:34:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:14,866 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-19 07:34:14,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-19 07:34:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-19 07:34:14,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:14,867 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:14,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:15,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-19 07:34:15,083 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 79 times [2022-03-19 07:34:15,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:15,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567957181] [2022-03-19 07:34:15,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:15,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 80 times [2022-03-19 07:34:15,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:15,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704956642] [2022-03-19 07:34:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:15,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:15,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:15,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704956642] [2022-03-19 07:34:15,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704956642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:15,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643206226] [2022-03-19 07:34:15,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:15,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:15,610 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:15,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 07:34:15,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:15,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:34:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:15,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:17,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643206226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:17,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:17,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-19 07:34:17,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567957181] [2022-03-19 07:34:17,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567957181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:17,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:17,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 07:34:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897731056] [2022-03-19 07:34:17,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:17,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 07:34:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:17,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 07:34:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 07:34:17,190 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:18,733 INFO L93 Difference]: Finished difference Result 269 states and 309 transitions. [2022-03-19 07:34:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 07:34:18,733 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-19 07:34:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:18,734 INFO L225 Difference]: With dead ends: 269 [2022-03-19 07:34:18,734 INFO L226 Difference]: Without dead ends: 255 [2022-03-19 07:34:18,735 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 07:34:18,736 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 644 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:18,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 31 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:34:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-19 07:34:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 101. [2022-03-19 07:34:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-19 07:34:18,771 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2022-03-19 07:34:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:18,771 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-19 07:34:18,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-19 07:34:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 07:34:18,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:18,772 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:18,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:18,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:18,989 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 81 times [2022-03-19 07:34:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005824971] [2022-03-19 07:34:18,991 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:18,991 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 82 times [2022-03-19 07:34:18,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:18,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584275320] [2022-03-19 07:34:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:19,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584275320] [2022-03-19 07:34:19,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584275320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283061172] [2022-03-19 07:34:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:34:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:19,424 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:19,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 07:34:19,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:34:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 07:34:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:19,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:21,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283061172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:21,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:21,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-19 07:34:21,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:21,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005824971] [2022-03-19 07:34:21,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005824971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:21,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:21,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 07:34:21,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85041786] [2022-03-19 07:34:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:21,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 07:34:21,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 07:34:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 07:34:21,302 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:23,072 INFO L93 Difference]: Finished difference Result 275 states and 316 transitions. [2022-03-19 07:34:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 07:34:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-19 07:34:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:23,073 INFO L225 Difference]: With dead ends: 275 [2022-03-19 07:34:23,073 INFO L226 Difference]: Without dead ends: 261 [2022-03-19 07:34:23,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 07:34:23,075 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 497 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:23,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 61 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:34:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-19 07:34:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 103. [2022-03-19 07:34:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-19 07:34:23,112 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2022-03-19 07:34:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:23,112 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-19 07:34:23,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-19 07:34:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:23,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:23,113 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:23,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:23,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:23,331 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 83 times [2022-03-19 07:34:23,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788857711] [2022-03-19 07:34:23,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:23,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 84 times [2022-03-19 07:34:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:23,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706777483] [2022-03-19 07:34:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:23,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:24,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706777483] [2022-03-19 07:34:24,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706777483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010697131] [2022-03-19 07:34:24,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:24,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:24,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:24,050 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:24,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 07:34:24,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:34:24,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:34:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-19 07:34:24,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-19 07:34:24,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010697131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:24,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:24,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-03-19 07:34:24,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:24,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788857711] [2022-03-19 07:34:24,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788857711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:24,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:24,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 07:34:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308069738] [2022-03-19 07:34:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:24,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 07:34:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 07:34:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:34:24,650 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:26,654 INFO L93 Difference]: Finished difference Result 281 states and 323 transitions. [2022-03-19 07:34:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 07:34:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:34:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:26,655 INFO L225 Difference]: With dead ends: 281 [2022-03-19 07:34:26,655 INFO L226 Difference]: Without dead ends: 267 [2022-03-19 07:34:26,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 07:34:26,656 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 505 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:26,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 71 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-19 07:34:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 105. [2022-03-19 07:34:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-03-19 07:34:26,713 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2022-03-19 07:34:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:26,713 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-03-19 07:34:26,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-03-19 07:34:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 07:34:26,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:26,714 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:26,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 07:34:26,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 07:34:26,932 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 85 times [2022-03-19 07:34:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:26,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1905452353] [2022-03-19 07:34:26,934 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:26,934 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 86 times [2022-03-19 07:34:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145166241] [2022-03-19 07:34:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:27,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145166241] [2022-03-19 07:34:27,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145166241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013532844] [2022-03-19 07:34:27,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:27,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:27,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:27,663 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:27,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 07:34:27,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 07:34:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:28,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:29,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013532844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:29,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:29,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-19 07:34:29,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1905452353] [2022-03-19 07:34:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1905452353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:29,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:29,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 07:34:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367770397] [2022-03-19 07:34:29,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:29,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 07:34:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 07:34:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 07:34:29,716 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:31,790 INFO L93 Difference]: Finished difference Result 287 states and 330 transitions. [2022-03-19 07:34:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 07:34:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-19 07:34:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:31,792 INFO L225 Difference]: With dead ends: 287 [2022-03-19 07:34:31,792 INFO L226 Difference]: Without dead ends: 273 [2022-03-19 07:34:31,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-19 07:34:31,793 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 628 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:31,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 41 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-19 07:34:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 107. [2022-03-19 07:34:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-19 07:34:31,834 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2022-03-19 07:34:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:31,834 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-19 07:34:31,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-19 07:34:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-19 07:34:31,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:31,834 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:31,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-19 07:34:32,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 07:34:32,048 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 87 times [2022-03-19 07:34:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:32,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141046330] [2022-03-19 07:34:32,049 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:32,049 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 88 times [2022-03-19 07:34:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:32,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666306956] [2022-03-19 07:34:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:32,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:32,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666306956] [2022-03-19 07:34:32,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666306956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707388752] [2022-03-19 07:34:32,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:34:32,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:32,746 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:32,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 07:34:33,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:34:33,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 07:34:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:33,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:34,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707388752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:34,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:34,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-19 07:34:34,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141046330] [2022-03-19 07:34:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141046330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:34,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:34,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 07:34:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659979106] [2022-03-19 07:34:34,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:34,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 07:34:34,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 07:34:34,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 07:34:34,863 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:36,894 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2022-03-19 07:34:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 07:34:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-03-19 07:34:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:36,895 INFO L225 Difference]: With dead ends: 293 [2022-03-19 07:34:36,896 INFO L226 Difference]: Without dead ends: 279 [2022-03-19 07:34:36,896 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 07:34:36,897 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:36,897 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 51 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-19 07:34:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2022-03-19 07:34:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-19 07:34:36,938 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2022-03-19 07:34:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:36,939 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-19 07:34:36,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-19 07:34:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-19 07:34:36,939 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:36,939 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:36,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:37,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-19 07:34:37,156 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 89 times [2022-03-19 07:34:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:37,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970679753] [2022-03-19 07:34:37,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:37,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 90 times [2022-03-19 07:34:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:37,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389256434] [2022-03-19 07:34:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:37,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:37,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389256434] [2022-03-19 07:34:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389256434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996388930] [2022-03-19 07:34:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:37,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:37,735 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:37,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 07:34:37,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:34:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:34:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-19 07:34:38,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-19 07:34:38,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996388930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:38,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:38,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-03-19 07:34:38,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:38,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970679753] [2022-03-19 07:34:38,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970679753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:38,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:38,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 07:34:38,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441507643] [2022-03-19 07:34:38,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:38,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 07:34:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 07:34:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:34:38,328 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:40,462 INFO L93 Difference]: Finished difference Result 299 states and 344 transitions. [2022-03-19 07:34:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 07:34:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-03-19 07:34:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:40,463 INFO L225 Difference]: With dead ends: 299 [2022-03-19 07:34:40,463 INFO L226 Difference]: Without dead ends: 285 [2022-03-19 07:34:40,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 07:34:40,465 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 700 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:40,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 36 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-19 07:34:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 111. [2022-03-19 07:34:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-19 07:34:40,516 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2022-03-19 07:34:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:40,517 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-19 07:34:40,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-19 07:34:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 07:34:40,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:40,517 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:40,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:40,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:40,735 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 91 times [2022-03-19 07:34:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326486412] [2022-03-19 07:34:40,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:40,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 92 times [2022-03-19 07:34:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:40,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695944333] [2022-03-19 07:34:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:41,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695944333] [2022-03-19 07:34:41,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695944333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492047250] [2022-03-19 07:34:41,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:41,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:41,531 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:41,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 07:34:41,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 07:34:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:41,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:43,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492047250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:43,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:43,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-19 07:34:43,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:43,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326486412] [2022-03-19 07:34:43,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326486412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:43,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:43,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 07:34:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556267144] [2022-03-19 07:34:43,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:43,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 07:34:43,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 07:34:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 07:34:43,664 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:46,138 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2022-03-19 07:34:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 07:34:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-03-19 07:34:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:46,148 INFO L225 Difference]: With dead ends: 305 [2022-03-19 07:34:46,148 INFO L226 Difference]: Without dead ends: 291 [2022-03-19 07:34:46,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-19 07:34:46,149 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 680 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:46,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 51 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-19 07:34:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 113. [2022-03-19 07:34:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-03-19 07:34:46,204 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2022-03-19 07:34:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:46,204 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-03-19 07:34:46,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-03-19 07:34:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-19 07:34:46,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:46,205 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:46,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:46,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 07:34:46,424 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 93 times [2022-03-19 07:34:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429038876] [2022-03-19 07:34:46,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:46,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 94 times [2022-03-19 07:34:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:46,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957472056] [2022-03-19 07:34:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:46,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:47,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:47,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957472056] [2022-03-19 07:34:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957472056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935855092] [2022-03-19 07:34:47,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:34:47,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:47,019 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:47,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 07:34:47,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:34:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:47,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 07:34:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:47,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:49,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935855092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:49,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:49,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-19 07:34:49,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429038876] [2022-03-19 07:34:49,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429038876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:49,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:49,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 07:34:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631955604] [2022-03-19 07:34:49,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:49,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 07:34:49,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 07:34:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 07:34:49,352 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:51,824 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2022-03-19 07:34:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 07:34:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-03-19 07:34:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:51,826 INFO L225 Difference]: With dead ends: 311 [2022-03-19 07:34:51,826 INFO L226 Difference]: Without dead ends: 297 [2022-03-19 07:34:51,827 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 07:34:51,827 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 939 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:51,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 26 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-19 07:34:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 115. [2022-03-19 07:34:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-03-19 07:34:51,886 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2022-03-19 07:34:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:51,886 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-03-19 07:34:51,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-03-19 07:34:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 07:34:51,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:51,887 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:51,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:52,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 07:34:52,103 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 95 times [2022-03-19 07:34:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270942550] [2022-03-19 07:34:52,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:52,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 96 times [2022-03-19 07:34:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:52,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462945623] [2022-03-19 07:34:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:52,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462945623] [2022-03-19 07:34:52,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462945623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447946916] [2022-03-19 07:34:52,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:52,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:52,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:52,912 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:52,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 07:34:53,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:34:53,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:34:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-19 07:34:53,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-19 07:34:53,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447946916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:53,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-03-19 07:34:53,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270942550] [2022-03-19 07:34:53,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270942550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:53,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 07:34:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561038233] [2022-03-19 07:34:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:53,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 07:34:53,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 07:34:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:34:53,542 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:56,409 INFO L93 Difference]: Finished difference Result 317 states and 365 transitions. [2022-03-19 07:34:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 07:34:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-19 07:34:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:56,411 INFO L225 Difference]: With dead ends: 317 [2022-03-19 07:34:56,411 INFO L226 Difference]: Without dead ends: 303 [2022-03-19 07:34:56,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 07:34:56,413 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 697 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:56,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 36 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-19 07:34:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 117. [2022-03-19 07:34:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-03-19 07:34:56,484 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2022-03-19 07:34:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:56,484 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-03-19 07:34:56,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-03-19 07:34:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 07:34:56,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:56,485 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:56,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:56,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:56,704 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 97 times [2022-03-19 07:34:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369305011] [2022-03-19 07:34:56,705 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:56,705 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 98 times [2022-03-19 07:34:56,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:56,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189749950] [2022-03-19 07:34:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:57,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:57,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189749950] [2022-03-19 07:34:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189749950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:57,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014283332] [2022-03-19 07:34:57,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:57,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:57,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:57,559 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:34:57,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 07:34:57,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 07:34:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:57,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:34:59,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014283332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:59,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-19 07:34:59,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369305011] [2022-03-19 07:34:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369305011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:59,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 07:34:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396818870] [2022-03-19 07:34:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:59,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 07:34:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 07:34:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 07:34:59,765 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:02,706 INFO L93 Difference]: Finished difference Result 323 states and 372 transitions. [2022-03-19 07:35:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 07:35:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-03-19 07:35:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:02,707 INFO L225 Difference]: With dead ends: 323 [2022-03-19 07:35:02,707 INFO L226 Difference]: Without dead ends: 309 [2022-03-19 07:35:02,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 07:35:02,710 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 760 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:02,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 46 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-19 07:35:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 119. [2022-03-19 07:35:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-19 07:35:02,793 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2022-03-19 07:35:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:02,793 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-19 07:35:02,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-19 07:35:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-19 07:35:02,794 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:02,794 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:02,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:03,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-19 07:35:03,007 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 99 times [2022-03-19 07:35:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:03,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259213421] [2022-03-19 07:35:03,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:03,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 100 times [2022-03-19 07:35:03,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756195162] [2022-03-19 07:35:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:03,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:03,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:03,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756195162] [2022-03-19 07:35:03,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756195162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:03,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665026972] [2022-03-19 07:35:03,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:35:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:03,905 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:03,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 07:35:04,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:35:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:04,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 07:35:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:04,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:06,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665026972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:06,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:06,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-19 07:35:06,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:06,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259213421] [2022-03-19 07:35:06,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259213421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:06,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:06,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 07:35:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234282522] [2022-03-19 07:35:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:06,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 07:35:06,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 07:35:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:35:06,186 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:09,115 INFO L93 Difference]: Finished difference Result 329 states and 379 transitions. [2022-03-19 07:35:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 07:35:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-03-19 07:35:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:09,116 INFO L225 Difference]: With dead ends: 329 [2022-03-19 07:35:09,117 INFO L226 Difference]: Without dead ends: 315 [2022-03-19 07:35:09,118 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 07:35:09,118 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 757 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:09,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 26 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-19 07:35:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 121. [2022-03-19 07:35:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-03-19 07:35:09,172 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2022-03-19 07:35:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:09,172 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-03-19 07:35:09,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-03-19 07:35:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 07:35:09,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:09,173 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:09,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-19 07:35:09,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:09,382 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 101 times [2022-03-19 07:35:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:09,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1860319366] [2022-03-19 07:35:09,383 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:09,383 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 102 times [2022-03-19 07:35:09,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:09,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059074711] [2022-03-19 07:35:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:09,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:10,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:10,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059074711] [2022-03-19 07:35:10,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059074711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:10,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326487146] [2022-03-19 07:35:10,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:35:10,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:10,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:10,324 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:10,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 07:35:10,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:35:10,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:35:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-19 07:35:10,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-19 07:35:10,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326487146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:10,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:10,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-03-19 07:35:10,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1860319366] [2022-03-19 07:35:10,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1860319366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:10,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:10,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-19 07:35:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645180962] [2022-03-19 07:35:10,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:10,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-19 07:35:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-19 07:35:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 07:35:10,946 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:14,299 INFO L93 Difference]: Finished difference Result 335 states and 386 transitions. [2022-03-19 07:35:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 07:35:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-03-19 07:35:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:14,302 INFO L225 Difference]: With dead ends: 335 [2022-03-19 07:35:14,302 INFO L226 Difference]: Without dead ends: 321 [2022-03-19 07:35:14,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 07:35:14,303 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 775 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:14,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 31 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-19 07:35:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 123. [2022-03-19 07:35:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-03-19 07:35:14,366 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2022-03-19 07:35:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:14,366 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-03-19 07:35:14,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-03-19 07:35:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 07:35:14,367 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:14,367 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:14,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-19 07:35:14,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-19 07:35:14,585 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 103 times [2022-03-19 07:35:14,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504657579] [2022-03-19 07:35:14,586 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:14,586 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:14,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 104 times [2022-03-19 07:35:14,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:14,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354614609] [2022-03-19 07:35:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:14,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:15,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354614609] [2022-03-19 07:35:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354614609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917606925] [2022-03-19 07:35:15,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:35:15,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:15,542 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:15,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 07:35:15,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:35:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 07:35:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917606925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:17,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:17,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-19 07:35:17,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504657579] [2022-03-19 07:35:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504657579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:17,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:17,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 07:35:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567624167] [2022-03-19 07:35:17,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:17,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 07:35:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 07:35:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 07:35:17,836 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:20,996 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2022-03-19 07:35:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 07:35:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-03-19 07:35:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:20,998 INFO L225 Difference]: With dead ends: 341 [2022-03-19 07:35:20,998 INFO L226 Difference]: Without dead ends: 327 [2022-03-19 07:35:20,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 07:35:20,999 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 827 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:20,999 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 31 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-19 07:35:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 125. [2022-03-19 07:35:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-03-19 07:35:21,068 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2022-03-19 07:35:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:21,068 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-03-19 07:35:21,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-03-19 07:35:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 07:35:21,069 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:21,069 INFO L500 BasicCegarLoop]: trace histogram [52, 52, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:21,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:21,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-19 07:35:21,288 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 105 times [2022-03-19 07:35:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:21,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260300900] [2022-03-19 07:35:21,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:21,296 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 106 times [2022-03-19 07:35:21,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:21,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76998819] [2022-03-19 07:35:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:22,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76998819] [2022-03-19 07:35:22,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76998819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025263333] [2022-03-19 07:35:22,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:35:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:22,247 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:22,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 07:35:22,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:35:22,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 07:35:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:22,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:25,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025263333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:25,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:25,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-19 07:35:25,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260300900] [2022-03-19 07:35:25,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260300900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:25,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:25,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 07:35:25,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140517534] [2022-03-19 07:35:25,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:25,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 07:35:25,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 07:35:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 07:35:25,025 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:28,539 INFO L93 Difference]: Finished difference Result 347 states and 400 transitions. [2022-03-19 07:35:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 07:35:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-03-19 07:35:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:28,540 INFO L225 Difference]: With dead ends: 347 [2022-03-19 07:35:28,540 INFO L226 Difference]: Without dead ends: 333 [2022-03-19 07:35:28,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-19 07:35:28,542 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 787 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:28,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 41 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-19 07:35:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 127. [2022-03-19 07:35:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-19 07:35:28,609 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2022-03-19 07:35:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:28,609 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-19 07:35:28,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-19 07:35:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-19 07:35:28,609 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:28,609 INFO L500 BasicCegarLoop]: trace histogram [53, 53, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:28,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:28,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:28,823 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 107 times [2022-03-19 07:35:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888412277] [2022-03-19 07:35:28,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:28,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 108 times [2022-03-19 07:35:28,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:28,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779054948] [2022-03-19 07:35:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:28,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:29,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:29,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779054948] [2022-03-19 07:35:29,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779054948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542496625] [2022-03-19 07:35:29,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:35:29,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:29,845 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:29,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 07:35:30,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:35:30,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:30,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:35:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-19 07:35:30,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-19 07:35:30,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542496625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:30,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:30,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-03-19 07:35:30,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:30,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888412277] [2022-03-19 07:35:30,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888412277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:30,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:30,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 07:35:30,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381484950] [2022-03-19 07:35:30,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:30,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 07:35:30,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 07:35:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 07:35:30,539 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:34,293 INFO L93 Difference]: Finished difference Result 353 states and 407 transitions. [2022-03-19 07:35:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 07:35:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-03-19 07:35:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:34,294 INFO L225 Difference]: With dead ends: 353 [2022-03-19 07:35:34,294 INFO L226 Difference]: Without dead ends: 339 [2022-03-19 07:35:34,295 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 07:35:34,295 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 812 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:34,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 36 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-19 07:35:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 129. [2022-03-19 07:35:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-03-19 07:35:34,361 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2022-03-19 07:35:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:34,361 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-03-19 07:35:34,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-03-19 07:35:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 07:35:34,362 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:34,362 INFO L500 BasicCegarLoop]: trace histogram [54, 54, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:34,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:34,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:34,581 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 109 times [2022-03-19 07:35:34,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:34,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691690284] [2022-03-19 07:35:34,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:34,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 110 times [2022-03-19 07:35:34,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:34,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87252158] [2022-03-19 07:35:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:35,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87252158] [2022-03-19 07:35:35,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87252158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:35,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161977174] [2022-03-19 07:35:35,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:35:35,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:35,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:35,452 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:35,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 07:35:35,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:35:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 07:35:35,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:36,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:38,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161977174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:38,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-19 07:35:38,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:38,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691690284] [2022-03-19 07:35:38,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691690284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:38,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:38,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 07:35:38,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860196640] [2022-03-19 07:35:38,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:38,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 07:35:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 07:35:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 07:35:38,315 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:42,042 INFO L93 Difference]: Finished difference Result 359 states and 414 transitions. [2022-03-19 07:35:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 07:35:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-03-19 07:35:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:42,043 INFO L225 Difference]: With dead ends: 359 [2022-03-19 07:35:42,043 INFO L226 Difference]: Without dead ends: 345 [2022-03-19 07:35:42,045 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-19 07:35:42,045 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 858 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:42,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 41 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:35:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-19 07:35:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 131. [2022-03-19 07:35:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-03-19 07:35:42,116 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2022-03-19 07:35:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:42,116 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-03-19 07:35:42,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-03-19 07:35:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-19 07:35:42,117 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:42,117 INFO L500 BasicCegarLoop]: trace histogram [55, 55, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:42,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:42,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:42,334 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 111 times [2022-03-19 07:35:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:42,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443005620] [2022-03-19 07:35:42,335 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:42,335 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 112 times [2022-03-19 07:35:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:42,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963511046] [2022-03-19 07:35:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:43,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963511046] [2022-03-19 07:35:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963511046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476852353] [2022-03-19 07:35:43,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:35:43,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:43,071 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:43,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 07:35:43,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:35:43,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 07:35:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:43,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:45,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476852353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:45,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:45,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-19 07:35:45,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443005620] [2022-03-19 07:35:45,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443005620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:45,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:45,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 07:35:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526042563] [2022-03-19 07:35:45,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:45,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 07:35:45,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 07:35:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 07:35:45,886 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:50,150 INFO L93 Difference]: Finished difference Result 365 states and 421 transitions. [2022-03-19 07:35:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 07:35:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-03-19 07:35:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:50,151 INFO L225 Difference]: With dead ends: 365 [2022-03-19 07:35:50,151 INFO L226 Difference]: Without dead ends: 351 [2022-03-19 07:35:50,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 07:35:50,153 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 899 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:50,153 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 41 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:35:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-19 07:35:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 133. [2022-03-19 07:35:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:50,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-03-19 07:35:50,223 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2022-03-19 07:35:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:50,223 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-03-19 07:35:50,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-03-19 07:35:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 07:35:50,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:50,224 INFO L500 BasicCegarLoop]: trace histogram [56, 56, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:50,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 07:35:50,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 07:35:50,432 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 113 times [2022-03-19 07:35:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:50,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193870375] [2022-03-19 07:35:50,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:50,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:50,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 114 times [2022-03-19 07:35:50,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:50,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230435767] [2022-03-19 07:35:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:50,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230435767] [2022-03-19 07:35:51,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230435767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38657700] [2022-03-19 07:35:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:35:51,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:51,414 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:51,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 07:35:51,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:35:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:35:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-19 07:35:51,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-19 07:35:52,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38657700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:52,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:52,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-03-19 07:35:52,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193870375] [2022-03-19 07:35:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193870375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:52,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:52,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 07:35:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805412769] [2022-03-19 07:35:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:52,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 07:35:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 07:35:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 07:35:52,202 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:56,692 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2022-03-19 07:35:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 07:35:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-03-19 07:35:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:56,694 INFO L225 Difference]: With dead ends: 371 [2022-03-19 07:35:56,694 INFO L226 Difference]: Without dead ends: 357 [2022-03-19 07:35:56,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 07:35:56,695 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 890 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:56,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 36 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:35:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-19 07:35:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 135. [2022-03-19 07:35:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-03-19 07:35:56,768 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2022-03-19 07:35:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:56,768 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-03-19 07:35:56,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-03-19 07:35:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-19 07:35:56,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:56,769 INFO L500 BasicCegarLoop]: trace histogram [57, 57, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:56,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:56,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-19 07:35:56,987 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 115 times [2022-03-19 07:35:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840739343] [2022-03-19 07:35:56,988 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:56,988 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 116 times [2022-03-19 07:35:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247697137] [2022-03-19 07:35:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:56,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:58,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:58,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247697137] [2022-03-19 07:35:58,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247697137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107050535] [2022-03-19 07:35:58,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:35:58,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:58,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:58,158 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:35:58,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 07:35:58,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:35:58,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 07:35:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:35:58,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:00,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107050535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:00,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:00,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-19 07:36:00,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:00,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840739343] [2022-03-19 07:36:00,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840739343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:00,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:00,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 07:36:00,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487386247] [2022-03-19 07:36:00,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:00,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 07:36:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 07:36:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 07:36:00,970 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:05,315 INFO L93 Difference]: Finished difference Result 377 states and 435 transitions. [2022-03-19 07:36:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 07:36:05,316 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-03-19 07:36:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:05,317 INFO L225 Difference]: With dead ends: 377 [2022-03-19 07:36:05,317 INFO L226 Difference]: Without dead ends: 363 [2022-03-19 07:36:05,318 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-19 07:36:05,318 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 832 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:05,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 46 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:36:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-19 07:36:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2022-03-19 07:36:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-03-19 07:36:05,400 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2022-03-19 07:36:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:05,400 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-03-19 07:36:05,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-03-19 07:36:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-19 07:36:05,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:05,401 INFO L500 BasicCegarLoop]: trace histogram [58, 58, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:05,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:05,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:05,605 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 117 times [2022-03-19 07:36:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:05,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151752973] [2022-03-19 07:36:05,607 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:05,607 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:05,607 INFO L85 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 118 times [2022-03-19 07:36:05,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:05,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451595264] [2022-03-19 07:36:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:06,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:06,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:06,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451595264] [2022-03-19 07:36:06,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451595264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:06,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543693200] [2022-03-19 07:36:06,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:36:06,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:06,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:06,705 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:36:06,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 07:36:07,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:36:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:07,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 07:36:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:07,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543693200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:10,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-19 07:36:10,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151752973] [2022-03-19 07:36:10,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151752973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:10,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:10,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 07:36:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698996736] [2022-03-19 07:36:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:10,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 07:36:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 07:36:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 07:36:10,113 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:14,730 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2022-03-19 07:36:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 07:36:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-03-19 07:36:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:14,731 INFO L225 Difference]: With dead ends: 383 [2022-03-19 07:36:14,731 INFO L226 Difference]: Without dead ends: 369 [2022-03-19 07:36:14,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-19 07:36:14,733 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 883 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:14,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 41 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:36:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-19 07:36:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 139. [2022-03-19 07:36:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-19 07:36:14,812 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2022-03-19 07:36:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:14,812 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-19 07:36:14,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-19 07:36:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 07:36:14,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:14,813 INFO L500 BasicCegarLoop]: trace histogram [59, 59, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:14,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:15,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:15,015 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 119 times [2022-03-19 07:36:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997763264] [2022-03-19 07:36:15,018 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:15,018 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 120 times [2022-03-19 07:36:15,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:15,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190956285] [2022-03-19 07:36:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:15,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:16,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:16,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190956285] [2022-03-19 07:36:16,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190956285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887830954] [2022-03-19 07:36:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:36:16,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:16,258 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:36:16,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 07:36:16,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:36:16,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:36:16,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-19 07:36:16,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-19 07:36:17,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887830954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:17,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:17,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-03-19 07:36:17,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997763264] [2022-03-19 07:36:17,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997763264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:17,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:17,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 07:36:17,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134178540] [2022-03-19 07:36:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:17,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 07:36:17,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 07:36:17,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 07:36:17,063 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:22,184 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2022-03-19 07:36:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 07:36:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-03-19 07:36:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:22,185 INFO L225 Difference]: With dead ends: 389 [2022-03-19 07:36:22,185 INFO L226 Difference]: Without dead ends: 375 [2022-03-19 07:36:22,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 07:36:22,186 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:22,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 31 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:36:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-19 07:36:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 141. [2022-03-19 07:36:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-03-19 07:36:22,269 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2022-03-19 07:36:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:22,269 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-03-19 07:36:22,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-03-19 07:36:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 07:36:22,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:22,270 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:22,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:22,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:22,488 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 121 times [2022-03-19 07:36:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:22,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [79606601] [2022-03-19 07:36:22,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:22,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 122 times [2022-03-19 07:36:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071367484] [2022-03-19 07:36:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:23,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071367484] [2022-03-19 07:36:23,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071367484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976037709] [2022-03-19 07:36:23,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:36:23,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:23,745 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:36:23,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 07:36:24,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:36:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 07:36:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:24,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:27,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976037709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:27,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:27,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-19 07:36:27,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:27,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [79606601] [2022-03-19 07:36:27,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [79606601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:27,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:27,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 07:36:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570351247] [2022-03-19 07:36:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:27,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 07:36:27,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 07:36:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-19 07:36:27,508 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:32,987 INFO L93 Difference]: Finished difference Result 395 states and 456 transitions. [2022-03-19 07:36:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 07:36:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-03-19 07:36:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:32,990 INFO L225 Difference]: With dead ends: 395 [2022-03-19 07:36:32,990 INFO L226 Difference]: Without dead ends: 381 [2022-03-19 07:36:32,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-19 07:36:32,992 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 833 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:32,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 46 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:36:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-19 07:36:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 143. [2022-03-19 07:36:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-03-19 07:36:33,087 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2022-03-19 07:36:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:33,088 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-03-19 07:36:33,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-03-19 07:36:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-19 07:36:33,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:33,088 INFO L500 BasicCegarLoop]: trace histogram [61, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:33,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:33,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:33,298 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 123 times [2022-03-19 07:36:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:33,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389538075] [2022-03-19 07:36:33,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:33,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 124 times [2022-03-19 07:36:33,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929248531] [2022-03-19 07:36:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:34,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929248531] [2022-03-19 07:36:34,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929248531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699138067] [2022-03-19 07:36:34,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:36:34,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:34,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:34,439 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:36:34,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 07:36:34,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:36:34,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 07:36:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:35,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:38,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699138067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:38,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:38,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-19 07:36:38,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389538075] [2022-03-19 07:36:38,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389538075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:38,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:38,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 07:36:38,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753949360] [2022-03-19 07:36:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:38,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 07:36:38,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 07:36:38,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 07:36:38,618 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:44,050 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2022-03-19 07:36:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 07:36:44,050 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-03-19 07:36:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:44,052 INFO L225 Difference]: With dead ends: 401 [2022-03-19 07:36:44,052 INFO L226 Difference]: Without dead ends: 387 [2022-03-19 07:36:44,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-19 07:36:44,054 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1043 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:44,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 31 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:36:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-19 07:36:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 145. [2022-03-19 07:36:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-03-19 07:36:44,174 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2022-03-19 07:36:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:44,175 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-03-19 07:36:44,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-03-19 07:36:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 07:36:44,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:44,175 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:44,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:44,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-19 07:36:44,394 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 125 times [2022-03-19 07:36:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:44,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944604091] [2022-03-19 07:36:44,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:44,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 126 times [2022-03-19 07:36:44,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383320770] [2022-03-19 07:36:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:45,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:45,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383320770] [2022-03-19 07:36:45,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383320770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:45,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915828185] [2022-03-19 07:36:45,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:36:45,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:45,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:45,780 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:36:45,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 07:36:46,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:36:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:36:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-19 07:36:46,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-19 07:36:46,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915828185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:46,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:46,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-03-19 07:36:46,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944604091] [2022-03-19 07:36:46,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944604091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:46,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:46,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 07:36:46,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357841568] [2022-03-19 07:36:46,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:46,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 07:36:46,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:46,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 07:36:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 07:36:46,680 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:52,796 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2022-03-19 07:36:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 07:36:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-03-19 07:36:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:52,797 INFO L225 Difference]: With dead ends: 407 [2022-03-19 07:36:52,797 INFO L226 Difference]: Without dead ends: 393 [2022-03-19 07:36:52,798 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 07:36:52,798 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 975 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:52,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 36 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:36:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-19 07:36:52,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 147. [2022-03-19 07:36:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-03-19 07:36:52,911 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2022-03-19 07:36:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:52,911 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-03-19 07:36:52,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-03-19 07:36:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 07:36:52,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:52,912 INFO L500 BasicCegarLoop]: trace histogram [63, 63, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:52,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:53,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:53,131 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 127 times [2022-03-19 07:36:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209654058] [2022-03-19 07:36:53,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:53,132 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 128 times [2022-03-19 07:36:53,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:53,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261160186] [2022-03-19 07:36:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:53,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:54,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:54,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261160186] [2022-03-19 07:36:54,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261160186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616065849] [2022-03-19 07:36:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:36:54,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:54,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:54,300 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:36:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 07:36:54,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:36:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 07:36:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:54,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:36:58,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616065849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:58,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:58,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-19 07:36:58,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:58,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209654058] [2022-03-19 07:36:58,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209654058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:58,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:58,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 07:36:58,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663371726] [2022-03-19 07:36:58,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:58,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 07:36:58,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 07:36:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 07:36:58,054 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:04,096 INFO L93 Difference]: Finished difference Result 413 states and 477 transitions. [2022-03-19 07:37:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 07:37:04,096 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-03-19 07:37:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:04,098 INFO L225 Difference]: With dead ends: 413 [2022-03-19 07:37:04,098 INFO L226 Difference]: Without dead ends: 399 [2022-03-19 07:37:04,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-19 07:37:04,100 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 975 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:04,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 46 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:37:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-19 07:37:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 149. [2022-03-19 07:37:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-03-19 07:37:04,200 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2022-03-19 07:37:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:04,200 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-03-19 07:37:04,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-03-19 07:37:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-19 07:37:04,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:04,200 INFO L500 BasicCegarLoop]: trace histogram [64, 64, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:04,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-19 07:37:04,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 07:37:04,418 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:04,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 129 times [2022-03-19 07:37:04,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:04,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769319304] [2022-03-19 07:37:04,419 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:04,419 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:04,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 130 times [2022-03-19 07:37:04,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:04,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654754315] [2022-03-19 07:37:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:04,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:05,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:05,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654754315] [2022-03-19 07:37:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654754315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121083465] [2022-03-19 07:37:05,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:37:05,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:05,616 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:37:05,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 07:37:06,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:37:06,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 07:37:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:06,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:09,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121083465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:09,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:09,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-19 07:37:09,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:09,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769319304] [2022-03-19 07:37:09,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769319304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:09,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:09,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 07:37:09,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085712012] [2022-03-19 07:37:09,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:09,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 07:37:09,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 07:37:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 07:37:09,036 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:15,504 INFO L93 Difference]: Finished difference Result 419 states and 484 transitions. [2022-03-19 07:37:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 07:37:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-03-19 07:37:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:15,506 INFO L225 Difference]: With dead ends: 419 [2022-03-19 07:37:15,506 INFO L226 Difference]: Without dead ends: 405 [2022-03-19 07:37:15,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 07:37:15,508 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 947 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:15,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 36 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:37:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-03-19 07:37:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 151. [2022-03-19 07:37:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-03-19 07:37:15,607 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2022-03-19 07:37:15,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:15,608 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-03-19 07:37:15,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-03-19 07:37:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-19 07:37:15,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:15,609 INFO L500 BasicCegarLoop]: trace histogram [65, 65, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:15,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-19 07:37:15,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-19 07:37:15,827 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 131 times [2022-03-19 07:37:15,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:15,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945088119] [2022-03-19 07:37:15,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:15,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 132 times [2022-03-19 07:37:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:15,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126781153] [2022-03-19 07:37:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:15,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:17,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:17,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126781153] [2022-03-19 07:37:17,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126781153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104671239] [2022-03-19 07:37:17,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:37:17,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:17,196 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:37:17,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 07:37:17,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:37:17,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:37:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-19 07:37:17,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-19 07:37:18,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104671239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:18,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:18,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-03-19 07:37:18,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:18,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945088119] [2022-03-19 07:37:18,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945088119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:18,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:18,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 07:37:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163318343] [2022-03-19 07:37:18,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:18,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 07:37:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 07:37:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 07:37:18,116 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:25,219 INFO L93 Difference]: Finished difference Result 425 states and 491 transitions. [2022-03-19 07:37:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 07:37:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-03-19 07:37:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:25,220 INFO L225 Difference]: With dead ends: 425 [2022-03-19 07:37:25,220 INFO L226 Difference]: Without dead ends: 411 [2022-03-19 07:37:25,221 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 07:37:25,222 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1065 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:25,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 36 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:37:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-19 07:37:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 153. [2022-03-19 07:37:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-03-19 07:37:25,327 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2022-03-19 07:37:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:25,328 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-03-19 07:37:25,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-03-19 07:37:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-19 07:37:25,328 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:25,328 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:25,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 07:37:25,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-19 07:37:25,532 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 133 times [2022-03-19 07:37:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:25,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897993781] [2022-03-19 07:37:25,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:25,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 134 times [2022-03-19 07:37:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:25,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447077520] [2022-03-19 07:37:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:27,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:27,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447077520] [2022-03-19 07:37:27,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447077520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705905371] [2022-03-19 07:37:27,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:37:27,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:27,018 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:37:27,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 07:37:27,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:37:27,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 07:37:27,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:27,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705905371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:31,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:31,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-19 07:37:31,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897993781] [2022-03-19 07:37:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897993781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:31,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:31,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-19 07:37:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900397878] [2022-03-19 07:37:31,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:31,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 07:37:31,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 07:37:31,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-19 07:37:31,806 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:39,345 INFO L93 Difference]: Finished difference Result 431 states and 498 transitions. [2022-03-19 07:37:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 07:37:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-19 07:37:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:39,346 INFO L225 Difference]: With dead ends: 431 [2022-03-19 07:37:39,346 INFO L226 Difference]: Without dead ends: 417 [2022-03-19 07:37:39,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-03-19 07:37:39,348 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:39,348 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 31 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:37:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-19 07:37:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 155. [2022-03-19 07:37:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-03-19 07:37:39,458 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2022-03-19 07:37:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:39,458 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-03-19 07:37:39,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-03-19 07:37:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 07:37:39,459 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:39,459 INFO L500 BasicCegarLoop]: trace histogram [67, 67, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:39,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-19 07:37:39,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-19 07:37:39,674 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 135 times [2022-03-19 07:37:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209336900] [2022-03-19 07:37:39,675 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:39,675 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 136 times [2022-03-19 07:37:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:39,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292759360] [2022-03-19 07:37:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:41,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292759360] [2022-03-19 07:37:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292759360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42615574] [2022-03-19 07:37:41,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:37:41,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:41,249 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:37:41,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 07:37:41,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:37:41,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:41,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 07:37:41,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:46,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42615574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:46,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:46,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-19 07:37:46,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:46,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209336900] [2022-03-19 07:37:46,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209336900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:46,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:46,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-19 07:37:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669881236] [2022-03-19 07:37:46,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:46,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-19 07:37:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-19 07:37:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 07:37:46,274 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:53,808 INFO L93 Difference]: Finished difference Result 437 states and 505 transitions. [2022-03-19 07:37:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 07:37:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-03-19 07:37:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:53,810 INFO L225 Difference]: With dead ends: 437 [2022-03-19 07:37:53,810 INFO L226 Difference]: Without dead ends: 423 [2022-03-19 07:37:53,812 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-19 07:37:53,812 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1214 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:53,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 36 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:37:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-19 07:37:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 157. [2022-03-19 07:37:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-19 07:37:53,925 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2022-03-19 07:37:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:53,925 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-19 07:37:53,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-19 07:37:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-19 07:37:53,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:53,926 INFO L500 BasicCegarLoop]: trace histogram [68, 68, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:53,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-19 07:37:54,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:54,145 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 137 times [2022-03-19 07:37:54,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:54,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384954899] [2022-03-19 07:37:54,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:54,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 138 times [2022-03-19 07:37:54,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:54,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994037350] [2022-03-19 07:37:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:37:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994037350] [2022-03-19 07:37:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994037350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953249827] [2022-03-19 07:37:55,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:37:55,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:55,653 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:37:55,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 07:37:56,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:37:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:37:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-19 07:37:56,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-19 07:37:56,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953249827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:56,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:56,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-03-19 07:37:56,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384954899] [2022-03-19 07:37:56,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384954899] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:56,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:56,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-19 07:37:56,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606425936] [2022-03-19 07:37:56,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:56,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 07:37:56,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 07:37:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 07:37:56,587 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:03,617 INFO L93 Difference]: Finished difference Result 443 states and 512 transitions. [2022-03-19 07:38:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 07:38:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-03-19 07:38:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:03,618 INFO L225 Difference]: With dead ends: 443 [2022-03-19 07:38:03,618 INFO L226 Difference]: Without dead ends: 429 [2022-03-19 07:38:03,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 07:38:03,620 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:03,620 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 46 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:38:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-19 07:38:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 159. [2022-03-19 07:38:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-03-19 07:38:03,731 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2022-03-19 07:38:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:03,731 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-03-19 07:38:03,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-03-19 07:38:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 07:38:03,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:03,732 INFO L500 BasicCegarLoop]: trace histogram [69, 69, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:03,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-19 07:38:03,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:03,939 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 139 times [2022-03-19 07:38:03,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:03,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1520944915] [2022-03-19 07:38:03,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:03,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 140 times [2022-03-19 07:38:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:03,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413070219] [2022-03-19 07:38:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:03,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:05,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413070219] [2022-03-19 07:38:05,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413070219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455844495] [2022-03-19 07:38:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:38:05,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:05,411 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:38:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 07:38:05,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:38:05,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:38:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 07:38:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:38:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:06,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:38:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455844495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:38:09,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:38:09,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-19 07:38:09,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:38:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1520944915] [2022-03-19 07:38:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1520944915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:38:09,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:38:09,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-19 07:38:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807854253] [2022-03-19 07:38:09,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:38:09,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 07:38:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 07:38:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-03-19 07:38:09,358 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:17,343 INFO L93 Difference]: Finished difference Result 449 states and 519 transitions. [2022-03-19 07:38:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 07:38:17,343 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-03-19 07:38:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:17,364 INFO L225 Difference]: With dead ends: 449 [2022-03-19 07:38:17,364 INFO L226 Difference]: Without dead ends: 435 [2022-03-19 07:38:17,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-03-19 07:38:17,367 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1119 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:17,367 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 46 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:38:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-19 07:38:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 161. [2022-03-19 07:38:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-03-19 07:38:17,500 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2022-03-19 07:38:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:17,500 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-03-19 07:38:17,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-03-19 07:38:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 07:38:17,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:17,501 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:17,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 07:38:17,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:17,720 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 141 times [2022-03-19 07:38:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:17,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338726410] [2022-03-19 07:38:17,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:17,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 142 times [2022-03-19 07:38:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767328814] [2022-03-19 07:38:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:19,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767328814] [2022-03-19 07:38:19,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767328814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954836041] [2022-03-19 07:38:19,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:38:19,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:19,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:19,269 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:38:19,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 07:38:19,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:38:19,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:38:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 07:38:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:38:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:20,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:38:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:23,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954836041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:38:23,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:38:23,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-19 07:38:23,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:38:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338726410] [2022-03-19 07:38:23,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338726410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:38:23,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:38:23,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-19 07:38:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219803527] [2022-03-19 07:38:23,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:38:23,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 07:38:23,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 07:38:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 07:38:23,283 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:31,455 INFO L93 Difference]: Finished difference Result 455 states and 526 transitions. [2022-03-19 07:38:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 07:38:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-03-19 07:38:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:31,457 INFO L225 Difference]: With dead ends: 455 [2022-03-19 07:38:31,457 INFO L226 Difference]: Without dead ends: 441 [2022-03-19 07:38:31,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-19 07:38:31,459 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:31,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 41 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:38:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-19 07:38:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 163. [2022-03-19 07:38:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-03-19 07:38:31,580 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2022-03-19 07:38:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:31,580 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-03-19 07:38:31,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-03-19 07:38:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-19 07:38:31,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:31,581 INFO L500 BasicCegarLoop]: trace histogram [71, 71, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:31,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-19 07:38:31,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-19 07:38:31,794 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 143 times [2022-03-19 07:38:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:31,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999228384] [2022-03-19 07:38:31,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:31,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 144 times [2022-03-19 07:38:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:31,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894683231] [2022-03-19 07:38:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:33,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:33,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894683231] [2022-03-19 07:38:33,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894683231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617327123] [2022-03-19 07:38:33,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:38:33,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:33,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:33,452 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:38:33,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 07:38:33,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:38:33,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:38:33,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:38:33,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:38:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-19 07:38:34,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:38:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-19 07:38:34,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617327123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:38:34,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:38:34,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-03-19 07:38:34,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:38:34,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999228384] [2022-03-19 07:38:34,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999228384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:38:34,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:38:34,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-19 07:38:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897749870] [2022-03-19 07:38:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:38:34,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 07:38:34,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 07:38:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 07:38:34,513 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:42,942 INFO L93 Difference]: Finished difference Result 461 states and 533 transitions. [2022-03-19 07:38:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 07:38:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-03-19 07:38:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:42,943 INFO L225 Difference]: With dead ends: 461 [2022-03-19 07:38:42,944 INFO L226 Difference]: Without dead ends: 447 [2022-03-19 07:38:42,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-03-19 07:38:42,945 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1222 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:42,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 31 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:38:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-19 07:38:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 165. [2022-03-19 07:38:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-03-19 07:38:43,070 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2022-03-19 07:38:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:43,070 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-03-19 07:38:43,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-03-19 07:38:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-19 07:38:43,091 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:43,092 INFO L500 BasicCegarLoop]: trace histogram [72, 72, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:43,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-19 07:38:43,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:43,310 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 145 times [2022-03-19 07:38:43,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:43,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180120924] [2022-03-19 07:38:43,311 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:43,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 146 times [2022-03-19 07:38:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:43,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234640206] [2022-03-19 07:38:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:43,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:44,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:44,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234640206] [2022-03-19 07:38:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234640206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066894006] [2022-03-19 07:38:44,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:38:44,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:44,628 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:38:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 07:38:45,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:38:45,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:38:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 07:38:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:38:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:38:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066894006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:38:48,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:38:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-19 07:38:48,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:38:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180120924] [2022-03-19 07:38:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180120924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:38:48,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:38:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-19 07:38:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821876363] [2022-03-19 07:38:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:38:48,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-19 07:38:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-19 07:38:48,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-03-19 07:38:48,525 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:57,669 INFO L93 Difference]: Finished difference Result 467 states and 540 transitions. [2022-03-19 07:38:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 07:38:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-03-19 07:38:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:57,677 INFO L225 Difference]: With dead ends: 467 [2022-03-19 07:38:57,677 INFO L226 Difference]: Without dead ends: 453 [2022-03-19 07:38:57,679 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-03-19 07:38:57,679 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1006 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:57,679 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 51 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:38:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-19 07:38:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 167. [2022-03-19 07:38:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-03-19 07:38:57,827 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2022-03-19 07:38:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:57,827 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-03-19 07:38:57,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-03-19 07:38:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-19 07:38:57,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:57,828 INFO L500 BasicCegarLoop]: trace histogram [73, 73, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:57,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-19 07:38:58,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:58,029 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 147 times [2022-03-19 07:38:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:58,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716872893] [2022-03-19 07:38:58,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:58,031 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 148 times [2022-03-19 07:38:58,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:58,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008494621] [2022-03-19 07:38:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:58,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:38:59,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:59,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008494621] [2022-03-19 07:38:59,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008494621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:59,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113550921] [2022-03-19 07:38:59,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:38:59,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:59,560 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:38:59,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 07:39:00,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:39:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:39:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 07:39:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:39:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:00,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:39:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:04,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113550921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:39:04,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:39:04,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-19 07:39:04,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:39:04,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716872893] [2022-03-19 07:39:04,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716872893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:39:04,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:39:04,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-19 07:39:04,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909961091] [2022-03-19 07:39:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:39:04,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-19 07:39:04,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-19 07:39:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-19 07:39:04,682 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:39:14,191 INFO L93 Difference]: Finished difference Result 473 states and 547 transitions. [2022-03-19 07:39:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 07:39:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-03-19 07:39:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:39:14,193 INFO L225 Difference]: With dead ends: 473 [2022-03-19 07:39:14,193 INFO L226 Difference]: Without dead ends: 459 [2022-03-19 07:39:14,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-19 07:39:14,195 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:39:14,196 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 46 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:39:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-19 07:39:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 169. [2022-03-19 07:39:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-19 07:39:14,347 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2022-03-19 07:39:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:39:14,347 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-19 07:39:14,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-19 07:39:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-19 07:39:14,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:39:14,348 INFO L500 BasicCegarLoop]: trace histogram [74, 74, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:39:14,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-19 07:39:14,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-19 07:39:14,567 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:39:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:39:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 149 times [2022-03-19 07:39:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178957263] [2022-03-19 07:39:14,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:39:14,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:39:14,569 INFO L85 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 150 times [2022-03-19 07:39:14,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:39:14,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225231617] [2022-03-19 07:39:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:39:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:39:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:39:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:39:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225231617] [2022-03-19 07:39:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225231617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:39:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147634982] [2022-03-19 07:39:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:39:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:39:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:39:16,370 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:39:16,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 07:39:16,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:39:16,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:39:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:39:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:39:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-19 07:39:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:39:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-19 07:39:17,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147634982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:39:17,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:39:17,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-03-19 07:39:17,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:39:17,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178957263] [2022-03-19 07:39:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178957263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:39:17,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:39:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-19 07:39:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473858436] [2022-03-19 07:39:17,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:39:17,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 07:39:17,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 07:39:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 07:39:17,252 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:39:26,820 INFO L93 Difference]: Finished difference Result 479 states and 554 transitions. [2022-03-19 07:39:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 07:39:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-03-19 07:39:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:39:26,823 INFO L225 Difference]: With dead ends: 479 [2022-03-19 07:39:26,823 INFO L226 Difference]: Without dead ends: 465 [2022-03-19 07:39:26,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 07:39:26,824 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1414 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:39:26,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 46 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:39:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-19 07:39:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 171. [2022-03-19 07:39:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-03-19 07:39:26,976 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2022-03-19 07:39:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:39:26,976 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-03-19 07:39:26,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-03-19 07:39:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-19 07:39:26,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:39:26,977 INFO L500 BasicCegarLoop]: trace histogram [75, 75, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:39:26,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-19 07:39:27,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-19 07:39:27,189 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:39:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:39:27,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 151 times [2022-03-19 07:39:27,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:27,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495301801] [2022-03-19 07:39:27,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:39:27,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:39:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 152 times [2022-03-19 07:39:27,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:39:27,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40286670] [2022-03-19 07:39:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:39:27,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:39:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:29,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:39:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:39:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40286670] [2022-03-19 07:39:29,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40286670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:39:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149456885] [2022-03-19 07:39:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:39:29,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:39:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:39:29,021 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:39:29,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 07:39:29,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:39:29,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:39:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 07:39:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:39:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:29,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:39:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:32,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149456885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:39:32,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:39:32,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-19 07:39:32,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:39:32,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495301801] [2022-03-19 07:39:32,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495301801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:39:32,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:39:32,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-19 07:39:32,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45065080] [2022-03-19 07:39:32,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:39:32,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 07:39:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 07:39:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 07:39:32,923 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:39:43,131 INFO L93 Difference]: Finished difference Result 485 states and 561 transitions. [2022-03-19 07:39:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 07:39:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-03-19 07:39:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:39:43,133 INFO L225 Difference]: With dead ends: 485 [2022-03-19 07:39:43,133 INFO L226 Difference]: Without dead ends: 471 [2022-03-19 07:39:43,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-03-19 07:39:43,135 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1398 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:39:43,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 21 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:39:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-19 07:39:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 173. [2022-03-19 07:39:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-03-19 07:39:43,278 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2022-03-19 07:39:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:39:43,278 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-03-19 07:39:43,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-03-19 07:39:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-19 07:39:43,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:39:43,279 INFO L500 BasicCegarLoop]: trace histogram [76, 76, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:39:43,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-19 07:39:43,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:39:43,498 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:39:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:39:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 153 times [2022-03-19 07:39:43,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:43,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1865940396] [2022-03-19 07:39:43,500 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:39:43,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:39:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 154 times [2022-03-19 07:39:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:39:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519948607] [2022-03-19 07:39:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:39:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:39:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:39:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:44,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:39:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519948607] [2022-03-19 07:39:44,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519948607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:39:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303284411] [2022-03-19 07:39:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:39:44,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:39:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:39:44,913 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:39:44,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 07:39:45,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:39:45,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:39:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-19 07:39:45,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:39:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:45,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:39:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:39:50,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303284411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:39:50,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:39:50,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-19 07:39:50,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:39:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1865940396] [2022-03-19 07:39:50,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1865940396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:39:50,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:39:50,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-19 07:39:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771202759] [2022-03-19 07:39:50,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:39:50,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 07:39:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 07:39:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-19 07:39:50,265 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:40:01,125 INFO L93 Difference]: Finished difference Result 491 states and 568 transitions. [2022-03-19 07:40:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 07:40:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-03-19 07:40:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:40:01,126 INFO L225 Difference]: With dead ends: 491 [2022-03-19 07:40:01,126 INFO L226 Difference]: Without dead ends: 477 [2022-03-19 07:40:01,129 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-19 07:40:01,129 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1165 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:40:01,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 41 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:40:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-19 07:40:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 175. [2022-03-19 07:40:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-03-19 07:40:01,290 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2022-03-19 07:40:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:40:01,290 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-03-19 07:40:01,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-03-19 07:40:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-19 07:40:01,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:40:01,291 INFO L500 BasicCegarLoop]: trace histogram [77, 77, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:40:01,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 07:40:01,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:01,510 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:40:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:40:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 155 times [2022-03-19 07:40:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:01,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753879134] [2022-03-19 07:40:01,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:40:01,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:40:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 156 times [2022-03-19 07:40:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:40:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104059300] [2022-03-19 07:40:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:40:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:40:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:03,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:40:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:03,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:40:03,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104059300] [2022-03-19 07:40:03,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104059300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:40:03,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956068606] [2022-03-19 07:40:03,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:40:03,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:03,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:40:03,265 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:40:03,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 07:40:03,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:40:03,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:40:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:40:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:40:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-19 07:40:04,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:40:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-19 07:40:04,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956068606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:40:04,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:40:04,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-03-19 07:40:04,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:40:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753879134] [2022-03-19 07:40:04,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753879134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:40:04,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:40:04,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-19 07:40:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332780946] [2022-03-19 07:40:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:40:04,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 07:40:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 07:40:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 07:40:04,396 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:40:15,500 INFO L93 Difference]: Finished difference Result 497 states and 575 transitions. [2022-03-19 07:40:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 07:40:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-03-19 07:40:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:40:15,501 INFO L225 Difference]: With dead ends: 497 [2022-03-19 07:40:15,501 INFO L226 Difference]: Without dead ends: 483 [2022-03-19 07:40:15,503 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 07:40:15,503 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1071 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:40:15,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 61 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:40:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-19 07:40:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 177. [2022-03-19 07:40:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-03-19 07:40:15,667 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2022-03-19 07:40:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:40:15,667 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-03-19 07:40:15,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-03-19 07:40:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 07:40:15,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:40:15,668 INFO L500 BasicCegarLoop]: trace histogram [78, 78, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:40:15,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-19 07:40:15,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:15,888 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:40:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:40:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 157 times [2022-03-19 07:40:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661607259] [2022-03-19 07:40:15,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:40:15,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:40:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 158 times [2022-03-19 07:40:15,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:40:15,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217597916] [2022-03-19 07:40:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:40:15,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:40:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:40:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:17,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:40:17,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217597916] [2022-03-19 07:40:17,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217597916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:40:17,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536306055] [2022-03-19 07:40:17,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:40:17,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:17,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:40:17,632 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:40:17,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 07:40:18,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:40:18,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:40:18,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 07:40:18,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:40:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:18,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:40:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:22,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536306055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:40:22,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:40:22,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-19 07:40:22,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:40:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661607259] [2022-03-19 07:40:22,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661607259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:40:22,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:40:22,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-19 07:40:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752838068] [2022-03-19 07:40:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:40:22,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 07:40:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:22,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 07:40:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 07:40:22,249 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:40:34,142 INFO L93 Difference]: Finished difference Result 503 states and 582 transitions. [2022-03-19 07:40:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 07:40:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-03-19 07:40:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:40:34,144 INFO L225 Difference]: With dead ends: 503 [2022-03-19 07:40:34,144 INFO L226 Difference]: Without dead ends: 489 [2022-03-19 07:40:34,147 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-03-19 07:40:34,147 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1230 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:40:34,147 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1230 Valid, 46 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:40:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-19 07:40:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 179. [2022-03-19 07:40:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-03-19 07:40:34,313 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2022-03-19 07:40:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:40:34,313 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-03-19 07:40:34,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-03-19 07:40:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-19 07:40:34,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:40:34,314 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:40:34,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-19 07:40:34,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:34,523 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:40:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:40:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 159 times [2022-03-19 07:40:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690539871] [2022-03-19 07:40:34,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:40:34,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:40:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 160 times [2022-03-19 07:40:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:40:34,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580851563] [2022-03-19 07:40:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:40:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:40:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:40:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:40:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580851563] [2022-03-19 07:40:36,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580851563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:40:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056031456] [2022-03-19 07:40:36,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:40:36,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:40:36,348 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:40:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 07:40:36,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:40:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:40:37,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 07:40:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:40:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:37,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:40:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:41,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056031456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:40:41,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:40:41,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-19 07:40:41,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:40:41,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690539871] [2022-03-19 07:40:41,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690539871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:40:41,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:40:41,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-19 07:40:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769302827] [2022-03-19 07:40:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:40:41,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-19 07:40:41,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-19 07:40:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 07:40:41,208 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:40:53,582 INFO L93 Difference]: Finished difference Result 509 states and 589 transitions. [2022-03-19 07:40:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-19 07:40:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-03-19 07:40:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:40:53,583 INFO L225 Difference]: With dead ends: 509 [2022-03-19 07:40:53,583 INFO L226 Difference]: Without dead ends: 495 [2022-03-19 07:40:53,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 07:40:53,586 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1273 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:40:53,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 41 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:40:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-19 07:40:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 181. [2022-03-19 07:40:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-03-19 07:40:53,747 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2022-03-19 07:40:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:40:53,747 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-03-19 07:40:53,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-03-19 07:40:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-03-19 07:40:53,748 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:40:53,748 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:40:53,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-19 07:40:53,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:53,965 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:40:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:40:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 161 times [2022-03-19 07:40:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838068379] [2022-03-19 07:40:53,966 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:40:53,966 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:40:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 162 times [2022-03-19 07:40:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:40:53,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853114588] [2022-03-19 07:40:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:40:53,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:40:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:40:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:40:56,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:40:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853114588] [2022-03-19 07:40:56,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853114588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:40:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553490548] [2022-03-19 07:40:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:40:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:40:56,080 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:40:56,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 07:40:56,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:40:56,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:40:56,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:40:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:40:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-19 07:40:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:40:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-19 07:40:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553490548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:40:57,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:40:57,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-03-19 07:40:57,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:40:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838068379] [2022-03-19 07:40:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838068379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:40:57,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:40:57,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-19 07:40:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213900932] [2022-03-19 07:40:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:40:57,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 07:40:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 07:40:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 07:40:57,267 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:41:09,984 INFO L93 Difference]: Finished difference Result 515 states and 596 transitions. [2022-03-19 07:41:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 07:41:09,985 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-03-19 07:41:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:41:09,986 INFO L225 Difference]: With dead ends: 515 [2022-03-19 07:41:09,986 INFO L226 Difference]: Without dead ends: 501 [2022-03-19 07:41:09,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 355 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 07:41:09,987 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1432 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:41:09,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 36 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:41:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-19 07:41:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 183. [2022-03-19 07:41:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-03-19 07:41:10,158 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2022-03-19 07:41:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:41:10,158 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-03-19 07:41:10,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-03-19 07:41:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-19 07:41:10,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:41:10,159 INFO L500 BasicCegarLoop]: trace histogram [81, 81, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:41:10,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-19 07:41:10,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-19 07:41:10,376 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:41:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:41:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 163 times [2022-03-19 07:41:10,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:10,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808724203] [2022-03-19 07:41:10,377 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:41:10,377 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:41:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 164 times [2022-03-19 07:41:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:41:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457196799] [2022-03-19 07:41:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:41:10,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:41:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:12,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:41:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:41:12,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457196799] [2022-03-19 07:41:12,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457196799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:41:12,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096667126] [2022-03-19 07:41:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:41:12,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:12,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:41:12,082 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:41:12,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 07:41:12,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:41:12,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:41:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 07:41:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:41:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:13,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:41:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096667126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:41:16,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:41:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-19 07:41:16,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:41:16,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808724203] [2022-03-19 07:41:16,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808724203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:41:16,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:41:16,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-19 07:41:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530187154] [2022-03-19 07:41:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:41:16,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 07:41:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:16,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 07:41:16,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 07:41:16,748 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:41:30,139 INFO L93 Difference]: Finished difference Result 521 states and 603 transitions. [2022-03-19 07:41:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-19 07:41:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-03-19 07:41:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:41:30,140 INFO L225 Difference]: With dead ends: 521 [2022-03-19 07:41:30,140 INFO L226 Difference]: Without dead ends: 507 [2022-03-19 07:41:30,143 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-03-19 07:41:30,143 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1373 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:41:30,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 46 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:41:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-19 07:41:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 185. [2022-03-19 07:41:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-03-19 07:41:30,319 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2022-03-19 07:41:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:41:30,319 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-03-19 07:41:30,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-03-19 07:41:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-19 07:41:30,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:41:30,320 INFO L500 BasicCegarLoop]: trace histogram [82, 82, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:41:30,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-19 07:41:30,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:30,540 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:41:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:41:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 165 times [2022-03-19 07:41:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:30,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554448948] [2022-03-19 07:41:30,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:41:30,542 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:41:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 166 times [2022-03-19 07:41:30,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:41:30,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835102356] [2022-03-19 07:41:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:41:30,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:41:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:32,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:41:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:32,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:41:32,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835102356] [2022-03-19 07:41:32,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835102356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:41:32,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091848028] [2022-03-19 07:41:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:41:32,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:32,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:41:32,425 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:41:32,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 07:41:33,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:41:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:41:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 07:41:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:41:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:33,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:41:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:38,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091848028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:41:38,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:41:38,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-19 07:41:38,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:41:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554448948] [2022-03-19 07:41:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554448948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:41:38,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:41:38,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-19 07:41:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702503977] [2022-03-19 07:41:38,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:41:38,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 07:41:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 07:41:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 07:41:38,402 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:41:52,107 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2022-03-19 07:41:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 07:41:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-03-19 07:41:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:41:52,112 INFO L225 Difference]: With dead ends: 527 [2022-03-19 07:41:52,112 INFO L226 Difference]: Without dead ends: 513 [2022-03-19 07:41:52,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-19 07:41:52,116 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1412 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:41:52,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 46 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:41:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-19 07:41:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 187. [2022-03-19 07:41:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-19 07:41:52,305 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2022-03-19 07:41:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:41:52,306 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-19 07:41:52,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-19 07:41:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-03-19 07:41:52,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:41:52,320 INFO L500 BasicCegarLoop]: trace histogram [83, 83, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:41:52,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-19 07:41:52,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:52,539 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:41:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:41:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 167 times [2022-03-19 07:41:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:52,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757138514] [2022-03-19 07:41:52,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:41:52,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:41:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 168 times [2022-03-19 07:41:52,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:41:52,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774852545] [2022-03-19 07:41:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:41:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:41:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:54,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:41:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:41:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:41:54,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774852545] [2022-03-19 07:41:54,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774852545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:41:54,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436753541] [2022-03-19 07:41:54,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:41:54,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:41:54,094 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:41:54,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 07:41:54,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:41:54,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:41:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:41:54,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:41:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-19 07:41:54,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:41:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-19 07:41:55,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436753541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:41:55,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:41:55,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-03-19 07:41:55,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:41:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757138514] [2022-03-19 07:41:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757138514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:41:55,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:41:55,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-19 07:41:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180228736] [2022-03-19 07:41:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:41:55,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 07:41:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 07:41:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 07:41:55,250 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:42:09,403 INFO L93 Difference]: Finished difference Result 533 states and 617 transitions. [2022-03-19 07:42:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 07:42:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-03-19 07:42:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:42:09,404 INFO L225 Difference]: With dead ends: 533 [2022-03-19 07:42:09,404 INFO L226 Difference]: Without dead ends: 519 [2022-03-19 07:42:09,406 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 07:42:09,406 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1390 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:42:09,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 31 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:42:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-19 07:42:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 189. [2022-03-19 07:42:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-03-19 07:42:09,594 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2022-03-19 07:42:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:42:09,594 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-03-19 07:42:09,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-03-19 07:42:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-19 07:42:09,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:42:09,595 INFO L500 BasicCegarLoop]: trace histogram [84, 84, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:42:09,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-19 07:42:09,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:42:09,812 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:42:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:42:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 169 times [2022-03-19 07:42:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:09,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506129683] [2022-03-19 07:42:09,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:42:09,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:42:09,814 INFO L85 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 170 times [2022-03-19 07:42:09,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:42:09,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26987120] [2022-03-19 07:42:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:42:09,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:42:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:42:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:42:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:42:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:42:11,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:42:11,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26987120] [2022-03-19 07:42:11,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26987120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:42:11,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166438124] [2022-03-19 07:42:11,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:42:11,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:42:11,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:42:11,860 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:42:11,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 07:42:12,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:42:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:42:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-19 07:42:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:42:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:42:12,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:42:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:42:17,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166438124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:42:17,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:42:17,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-19 07:42:17,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:42:17,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1506129683] [2022-03-19 07:42:17,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1506129683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:42:17,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:42:17,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-19 07:42:17,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121047907] [2022-03-19 07:42:17,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:42:17,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-19 07:42:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:17,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-19 07:42:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 07:42:17,374 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:42:32,479 INFO L93 Difference]: Finished difference Result 539 states and 624 transitions. [2022-03-19 07:42:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 07:42:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-03-19 07:42:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:42:32,480 INFO L225 Difference]: With dead ends: 539 [2022-03-19 07:42:32,481 INFO L226 Difference]: Without dead ends: 525 [2022-03-19 07:42:32,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-03-19 07:42:32,484 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1605 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:42:32,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 36 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:42:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-03-19 07:42:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 191. [2022-03-19 07:42:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2022-03-19 07:42:32,670 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2022-03-19 07:42:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:42:32,670 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2022-03-19 07:42:32,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2022-03-19 07:42:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-19 07:42:32,671 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:42:32,671 INFO L500 BasicCegarLoop]: trace histogram [85, 85, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:42:32,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-19 07:42:32,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:42:32,885 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:42:32,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:42:32,885 INFO L85 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 171 times [2022-03-19 07:42:32,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:32,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484071354] [2022-03-19 07:42:32,887 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:42:32,887 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:42:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 172 times [2022-03-19 07:42:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:42:32,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309966184] [2022-03-19 07:42:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:42:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:42:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:42:35,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:42:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:42:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:42:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:42:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309966184] [2022-03-19 07:42:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309966184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:42:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962579286] [2022-03-19 07:42:35,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:42:35,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:42:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:42:35,256 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:42:35,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 07:42:35,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:42:36,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:42:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 07:42:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:42:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:42:36,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:42:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:42:42,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962579286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:42:42,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:42:42,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-19 07:42:42,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:42:42,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484071354] [2022-03-19 07:42:42,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484071354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:42:42,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:42:42,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-19 07:42:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978911389] [2022-03-19 07:42:42,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:42:42,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-19 07:42:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-19 07:42:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 07:42:42,417 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:42:57,874 INFO L93 Difference]: Finished difference Result 545 states and 631 transitions. [2022-03-19 07:42:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-19 07:42:57,875 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-03-19 07:42:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:42:57,876 INFO L225 Difference]: With dead ends: 545 [2022-03-19 07:42:57,876 INFO L226 Difference]: Without dead ends: 531 [2022-03-19 07:42:57,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-19 07:42:57,879 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1705 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:42:57,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 46 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:42:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-19 07:42:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 193. [2022-03-19 07:42:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-03-19 07:42:58,074 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2022-03-19 07:42:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:42:58,074 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-03-19 07:42:58,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-03-19 07:42:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-03-19 07:42:58,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:42:58,075 INFO L500 BasicCegarLoop]: trace histogram [86, 86, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:42:58,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-19 07:42:58,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:42:58,284 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:42:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:42:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 173 times [2022-03-19 07:42:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:58,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1156202562] [2022-03-19 07:42:58,285 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:42:58,285 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:42:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 174 times [2022-03-19 07:42:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:42:58,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56308752] [2022-03-19 07:42:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:42:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:42:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:43:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:43:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:43:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:00,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:43:00,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56308752] [2022-03-19 07:43:00,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56308752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:43:00,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777866242] [2022-03-19 07:43:00,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:43:00,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:43:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:43:00,194 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:43:00,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 07:43:00,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:43:00,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:43:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:43:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:43:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-19 07:43:01,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:43:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-19 07:43:01,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777866242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:43:01,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:43:01,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-03-19 07:43:01,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:43:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1156202562] [2022-03-19 07:43:01,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1156202562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:43:01,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:43:01,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-19 07:43:01,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96700399] [2022-03-19 07:43:01,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:43:01,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-19 07:43:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:43:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-19 07:43:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 07:43:01,427 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:43:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:43:17,259 INFO L93 Difference]: Finished difference Result 551 states and 638 transitions. [2022-03-19 07:43:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-19 07:43:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-03-19 07:43:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:43:17,261 INFO L225 Difference]: With dead ends: 551 [2022-03-19 07:43:17,261 INFO L226 Difference]: Without dead ends: 537 [2022-03-19 07:43:17,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 07:43:17,263 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1332 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:43:17,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 46 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:43:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-19 07:43:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 195. [2022-03-19 07:43:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:43:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-03-19 07:43:17,457 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2022-03-19 07:43:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:43:17,458 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-03-19 07:43:17,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:43:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-03-19 07:43:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-19 07:43:17,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:43:17,458 INFO L500 BasicCegarLoop]: trace histogram [87, 87, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:43:17,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-19 07:43:17,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-19 07:43:17,659 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:43:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:43:17,659 INFO L85 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 175 times [2022-03-19 07:43:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:43:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1833158208] [2022-03-19 07:43:17,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:43:17,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:43:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 176 times [2022-03-19 07:43:17,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:43:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301687335] [2022-03-19 07:43:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:43:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:43:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:43:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:43:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:43:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:19,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:43:19,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301687335] [2022-03-19 07:43:19,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301687335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:43:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464282319] [2022-03-19 07:43:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:43:19,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:43:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:43:19,574 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:43:19,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 07:43:20,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:43:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:43:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 07:43:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:43:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:20,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:43:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:24,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464282319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:43:24,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:43:24,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-19 07:43:24,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:43:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1833158208] [2022-03-19 07:43:24,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1833158208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:43:24,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:43:24,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-19 07:43:24,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603263766] [2022-03-19 07:43:24,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:43:24,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 07:43:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:43:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 07:43:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-03-19 07:43:24,761 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:43:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:43:41,321 INFO L93 Difference]: Finished difference Result 557 states and 645 transitions. [2022-03-19 07:43:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-19 07:43:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-03-19 07:43:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:43:41,323 INFO L225 Difference]: With dead ends: 557 [2022-03-19 07:43:41,323 INFO L226 Difference]: Without dead ends: 543 [2022-03-19 07:43:41,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-03-19 07:43:41,326 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1506 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:43:41,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 46 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:43:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-19 07:43:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 197. [2022-03-19 07:43:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:43:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-03-19 07:43:41,534 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2022-03-19 07:43:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:43:41,534 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-03-19 07:43:41,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:43:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-03-19 07:43:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-19 07:43:41,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:43:41,535 INFO L500 BasicCegarLoop]: trace histogram [88, 88, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:43:41,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-19 07:43:41,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:43:41,751 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:43:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:43:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 177 times [2022-03-19 07:43:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:43:41,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112754061] [2022-03-19 07:43:41,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:43:41,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:43:41,753 INFO L85 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 178 times [2022-03-19 07:43:41,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:43:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505108485] [2022-03-19 07:43:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:43:41,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:43:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:43:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:43:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:43:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:43:43,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505108485] [2022-03-19 07:43:43,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505108485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:43:43,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048680493] [2022-03-19 07:43:43,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:43:43,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:43:43,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:43:43,824 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:43:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 07:43:44,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:43:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:43:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-19 07:43:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:43:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:44,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:43:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:43:50,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048680493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:43:50,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:43:50,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-19 07:43:50,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:43:50,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112754061] [2022-03-19 07:43:50,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112754061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:43:50,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:43:50,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-19 07:43:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530857298] [2022-03-19 07:43:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:43:50,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 07:43:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:43:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 07:43:50,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-19 07:43:50,842 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:44:08,487 INFO L93 Difference]: Finished difference Result 563 states and 652 transitions. [2022-03-19 07:44:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 07:44:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-03-19 07:44:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:44:08,489 INFO L225 Difference]: With dead ends: 563 [2022-03-19 07:44:08,489 INFO L226 Difference]: Without dead ends: 549 [2022-03-19 07:44:08,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-19 07:44:08,492 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1681 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:44:08,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 21 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:44:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-19 07:44:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 199. [2022-03-19 07:44:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-03-19 07:44:08,699 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2022-03-19 07:44:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:44:08,699 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-03-19 07:44:08,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-03-19 07:44:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-19 07:44:08,700 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:44:08,700 INFO L500 BasicCegarLoop]: trace histogram [89, 89, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:44:08,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-19 07:44:08,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:44:08,921 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:44:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:44:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 179 times [2022-03-19 07:44:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:44:08,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892991461] [2022-03-19 07:44:08,922 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:44:08,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:44:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 180 times [2022-03-19 07:44:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:44:08,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372259332] [2022-03-19 07:44:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:44:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:44:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:44:10,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:44:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:44:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:44:10,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:44:10,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372259332] [2022-03-19 07:44:10,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372259332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:44:10,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298897531] [2022-03-19 07:44:10,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:44:10,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:44:10,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:44:10,695 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:44:10,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-19 07:44:11,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:44:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:44:11,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:44:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:44:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-19 07:44:11,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:44:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-19 07:44:12,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298897531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:44:12,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:44:12,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 99 [2022-03-19 07:44:12,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:44:12,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892991461] [2022-03-19 07:44:12,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892991461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:44:12,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:44:12,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-19 07:44:12,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51746504] [2022-03-19 07:44:12,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:44:12,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-19 07:44:12,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:44:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-19 07:44:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 07:44:12,024 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:44:29,057 INFO L93 Difference]: Finished difference Result 569 states and 659 transitions. [2022-03-19 07:44:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-19 07:44:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-03-19 07:44:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:44:29,059 INFO L225 Difference]: With dead ends: 569 [2022-03-19 07:44:29,059 INFO L226 Difference]: Without dead ends: 555 [2022-03-19 07:44:29,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 391 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4637 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=13207, Invalid=22325, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 07:44:29,061 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1537 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:44:29,061 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 51 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:44:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-19 07:44:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 201. [2022-03-19 07:44:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-03-19 07:44:29,276 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2022-03-19 07:44:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:44:29,276 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-03-19 07:44:29,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-03-19 07:44:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-03-19 07:44:29,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:44:29,277 INFO L500 BasicCegarLoop]: trace histogram [90, 90, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:44:29,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-19 07:44:29,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:44:29,491 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:44:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:44:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1125230755, now seen corresponding path program 181 times [2022-03-19 07:44:29,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:44:29,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [595375324] [2022-03-19 07:44:29,493 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:44:29,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:44:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1125230755, now seen corresponding path program 182 times [2022-03-19 07:44:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:44:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286925975] [2022-03-19 07:44:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:44:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:44:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:44:31,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:44:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:44:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8107 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:44:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:44:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286925975] [2022-03-19 07:44:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286925975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:44:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265824632] [2022-03-19 07:44:31,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:44:31,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:44:31,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:44:31,936 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:44:31,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-19 07:44:32,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:44:32,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:44:32,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-19 07:44:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:44:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8107 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:44:32,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:44:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8107 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:44:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265824632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:44:37,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:44:37,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-19 07:44:37,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:44:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [595375324] [2022-03-19 07:44:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [595375324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:44:37,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:44:37,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-19 07:44:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604029100] [2022-03-19 07:44:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:44:37,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-19 07:44:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:44:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-19 07:44:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-03-19 07:44:37,552 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:44:55,802 INFO L93 Difference]: Finished difference Result 575 states and 666 transitions. [2022-03-19 07:44:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 07:44:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-03-19 07:44:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:44:55,804 INFO L225 Difference]: With dead ends: 575 [2022-03-19 07:44:55,804 INFO L226 Difference]: Without dead ends: 561 [2022-03-19 07:44:55,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-03-19 07:44:55,807 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1644 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:44:55,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 36 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:44:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-03-19 07:44:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 203. [2022-03-19 07:44:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2022-03-19 07:44:56,029 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2022-03-19 07:44:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:44:56,029 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2022-03-19 07:44:56,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:44:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2022-03-19 07:44:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-03-19 07:44:56,030 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:44:56,030 INFO L500 BasicCegarLoop]: trace histogram [91, 91, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:44:56,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-19 07:44:56,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:44:56,251 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:44:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:44:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1547619013, now seen corresponding path program 183 times [2022-03-19 07:44:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:44:56,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717289967] [2022-03-19 07:44:56,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:44:56,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:44:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1547619013, now seen corresponding path program 184 times [2022-03-19 07:44:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:44:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4235199] [2022-03-19 07:44:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:44:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:44:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:44:58,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:44:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:44:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8288 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:44:58,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:44:58,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4235199] [2022-03-19 07:44:58,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4235199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:44:58,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013572604] [2022-03-19 07:44:58,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:44:58,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:44:58,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:44:58,944 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:44:58,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-19 07:44:59,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:44:59,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:44:59,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 07:44:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:45:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8288 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:45:00,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:45:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8288 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:45:05,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013572604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:45:05,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:45:05,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-19 07:45:05,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:45:05,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717289967] [2022-03-19 07:45:05,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717289967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:45:05,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:45:05,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-19 07:45:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092159866] [2022-03-19 07:45:05,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:45:05,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-19 07:45:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:45:05,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-19 07:45:05,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 07:45:05,106 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:45:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:45:24,276 INFO L93 Difference]: Finished difference Result 581 states and 673 transitions. [2022-03-19 07:45:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-19 07:45:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-03-19 07:45:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:45:24,278 INFO L225 Difference]: With dead ends: 581 [2022-03-19 07:45:24,278 INFO L226 Difference]: Without dead ends: 567 [2022-03-19 07:45:24,281 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-03-19 07:45:24,282 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1683 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:45:24,282 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 51 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:45:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-19 07:45:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 205. [2022-03-19 07:45:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:45:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-03-19 07:45:24,508 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2022-03-19 07:45:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:45:24,509 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-03-19 07:45:24,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:45:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-03-19 07:45:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-19 07:45:24,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:45:24,509 INFO L500 BasicCegarLoop]: trace histogram [92, 92, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:45:24,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-19 07:45:24,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:45:24,712 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:45:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:45:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -559158169, now seen corresponding path program 185 times [2022-03-19 07:45:24,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:45:24,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760289665] [2022-03-19 07:45:24,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:45:24,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:45:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash -559158169, now seen corresponding path program 186 times [2022-03-19 07:45:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:45:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420130892] [2022-03-19 07:45:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:45:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:45:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:45:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:45:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:45:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8471 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:45:26,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:45:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420130892] [2022-03-19 07:45:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420130892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:45:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821076931] [2022-03-19 07:45:26,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:45:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:45:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:45:26,684 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:45:26,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-19 07:45:27,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:45:27,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:45:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:45:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:45:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8471 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8464 trivial. 0 not checked. [2022-03-19 07:45:27,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:45:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8471 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8464 trivial. 0 not checked. [2022-03-19 07:45:27,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821076931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:45:27,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:45:27,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 7, 7] total 102 [2022-03-19 07:45:27,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:45:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760289665] [2022-03-19 07:45:27,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760289665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:45:27,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:45:27,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-19 07:45:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135972681] [2022-03-19 07:45:27,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:45:27,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-19 07:45:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:45:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-19 07:45:27,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4857, Invalid=5445, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 07:45:27,779 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:45:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:45:46,993 INFO L93 Difference]: Finished difference Result 587 states and 680 transitions. [2022-03-19 07:45:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 07:45:46,993 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-03-19 07:45:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:45:46,995 INFO L225 Difference]: With dead ends: 587 [2022-03-19 07:45:46,995 INFO L226 Difference]: Without dead ends: 573 [2022-03-19 07:45:46,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4931 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=14065, Invalid=23765, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 07:45:46,997 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1418 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:45:46,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1418 Valid, 61 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:45:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-03-19 07:45:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 207. [2022-03-19 07:45:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:45:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2022-03-19 07:45:47,229 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2022-03-19 07:45:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:45:47,229 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2022-03-19 07:45:47,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:45:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2022-03-19 07:45:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-03-19 07:45:47,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:45:47,230 INFO L500 BasicCegarLoop]: trace histogram [93, 93, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:45:47,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-19 07:45:47,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-19 07:45:47,435 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:45:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:45:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2052533641, now seen corresponding path program 187 times [2022-03-19 07:45:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:45:47,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [654729170] [2022-03-19 07:45:47,436 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:45:47,436 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:45:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2052533641, now seen corresponding path program 188 times [2022-03-19 07:45:47,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:45:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034243498] [2022-03-19 07:45:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:45:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:45:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:45:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:45:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:45:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8656 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:45:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:45:49,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034243498] [2022-03-19 07:45:49,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034243498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:45:49,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210860478] [2022-03-19 07:45:49,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:45:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:45:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:45:49,967 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:45:49,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-19 07:45:50,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:45:50,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:45:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 07:45:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:45:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8656 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:45:51,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:45:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8656 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:45:56,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210860478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:45:56,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:45:56,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-03-19 07:45:56,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:45:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [654729170] [2022-03-19 07:45:56,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [654729170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:45:56,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:45:56,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-19 07:45:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976409285] [2022-03-19 07:45:56,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:45:56,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-19 07:45:56,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:45:56,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-19 07:45:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18147, Invalid=18525, Unknown=0, NotChecked=0, Total=36672 [2022-03-19 07:45:56,205 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:46:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:46:16,991 INFO L93 Difference]: Finished difference Result 593 states and 687 transitions. [2022-03-19 07:46:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-19 07:46:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-03-19 07:46:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:46:16,993 INFO L225 Difference]: With dead ends: 593 [2022-03-19 07:46:16,993 INFO L226 Difference]: Without dead ends: 579 [2022-03-19 07:46:16,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=36102, Invalid=45408, Unknown=0, NotChecked=0, Total=81510 [2022-03-19 07:46:16,996 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1629 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:46:16,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1629 Valid, 46 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:46:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-03-19 07:46:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 209. [2022-03-19 07:46:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:46:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-03-19 07:46:17,238 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2022-03-19 07:46:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:46:17,238 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-03-19 07:46:17,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:46:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-03-19 07:46:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-03-19 07:46:17,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:46:17,239 INFO L500 BasicCegarLoop]: trace histogram [94, 94, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:46:17,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-19 07:46:17,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-19 07:46:17,452 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:46:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:46:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash -667505109, now seen corresponding path program 189 times [2022-03-19 07:46:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:46:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [897078380] [2022-03-19 07:46:17,454 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:46:17,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:46:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash -667505109, now seen corresponding path program 190 times [2022-03-19 07:46:17,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:46:17,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775441417] [2022-03-19 07:46:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:46:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:46:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:46:19,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:46:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:46:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8843 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:46:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:46:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775441417] [2022-03-19 07:46:19,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775441417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:46:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12225744] [2022-03-19 07:46:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:46:19,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:46:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:46:19,695 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:46:19,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-19 07:46:20,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:46:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:46:20,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 07:46:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:46:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8843 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:46:20,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:46:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8843 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:46:26,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12225744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:46:26,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:46:26,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-19 07:46:26,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:46:26,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [897078380] [2022-03-19 07:46:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [897078380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:46:26,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:46:26,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-19 07:46:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281697211] [2022-03-19 07:46:26,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:46:26,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 07:46:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:46:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 07:46:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-19 07:46:26,933 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:46:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:46:48,716 INFO L93 Difference]: Finished difference Result 599 states and 694 transitions. [2022-03-19 07:46:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-19 07:46:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-03-19 07:46:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:46:48,731 INFO L225 Difference]: With dead ends: 599 [2022-03-19 07:46:48,732 INFO L226 Difference]: Without dead ends: 585 [2022-03-19 07:46:48,735 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=36866, Invalid=46366, Unknown=0, NotChecked=0, Total=83232 [2022-03-19 07:46:48,736 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1381 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:46:48,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 61 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:46:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-19 07:46:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 211. [2022-03-19 07:46:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:46:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-03-19 07:46:48,989 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2022-03-19 07:46:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:46:48,989 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-03-19 07:46:48,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:46:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-03-19 07:46:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-03-19 07:46:48,990 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:46:48,990 INFO L500 BasicCegarLoop]: trace histogram [95, 95, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:46:49,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-19 07:46:49,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:46:49,212 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:46:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:46:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1010339405, now seen corresponding path program 191 times [2022-03-19 07:46:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:46:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514285970] [2022-03-19 07:46:49,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:46:49,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:46:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1010339405, now seen corresponding path program 192 times [2022-03-19 07:46:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:46:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748907047] [2022-03-19 07:46:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:46:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:46:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:46:51,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:46:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:46:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9032 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:46:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:46:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748907047] [2022-03-19 07:46:51,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748907047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:46:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084802180] [2022-03-19 07:46:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:46:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:46:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:46:51,408 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:46:51,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-19 07:46:52,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 07:46:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:46:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:46:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:46:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9032 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9025 trivial. 0 not checked. [2022-03-19 07:46:52,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:46:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9032 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9025 trivial. 0 not checked. [2022-03-19 07:46:52,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084802180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:46:52,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:46:52,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 7, 7] total 105 [2022-03-19 07:46:52,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:46:52,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514285970] [2022-03-19 07:46:52,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514285970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:46:52,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:46:52,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-19 07:46:52,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87783348] [2022-03-19 07:46:52,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:46:52,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-19 07:46:52,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:46:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-19 07:46:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5157, Invalid=5763, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 07:46:52,654 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:14,354 INFO L93 Difference]: Finished difference Result 605 states and 701 transitions. [2022-03-19 07:47:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-19 07:47:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-03-19 07:47:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:14,356 INFO L225 Difference]: With dead ends: 605 [2022-03-19 07:47:14,356 INFO L226 Difference]: Without dead ends: 591 [2022-03-19 07:47:14,357 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14950, Invalid=25250, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 07:47:14,358 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1595 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:14,358 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 46 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:47:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-19 07:47:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 213. [2022-03-19 07:47:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2022-03-19 07:47:14,605 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2022-03-19 07:47:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:14,605 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2022-03-19 07:47:14,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2022-03-19 07:47:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-19 07:47:14,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:14,606 INFO L500 BasicCegarLoop]: trace histogram [96, 96, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:14,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-19 07:47:14,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:47:14,809 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:14,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1488785937, now seen corresponding path program 193 times [2022-03-19 07:47:14,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:14,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630857791] [2022-03-19 07:47:14,810 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:47:14,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:47:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1488785937, now seen corresponding path program 194 times [2022-03-19 07:47:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:14,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000270153] [2022-03-19 07:47:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:16,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:47:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:47:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9223 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:47:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:47:16,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000270153] [2022-03-19 07:47:16,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000270153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:47:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746633377] [2022-03-19 07:47:16,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:47:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:47:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:47:16,835 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:47:16,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-19 07:47:17,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:47:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:47:17,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-19 07:47:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:47:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9223 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:47:18,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:47:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9223 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 07:47:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746633377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:47:23,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:47:23,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-03-19 07:47:23,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:47:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630857791] [2022-03-19 07:47:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630857791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:47:23,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:47:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-19 07:47:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643406473] [2022-03-19 07:47:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:47:23,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-19 07:47:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-19 07:47:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2022-03-19 07:47:23,407 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:47:46,048 INFO L93 Difference]: Finished difference Result 611 states and 708 transitions. [2022-03-19 07:47:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-19 07:47:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-03-19 07:47:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:47:46,050 INFO L225 Difference]: With dead ends: 611 [2022-03-19 07:47:46,050 INFO L226 Difference]: Without dead ends: 597 [2022-03-19 07:47:46,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=38418, Invalid=48312, Unknown=0, NotChecked=0, Total=86730 [2022-03-19 07:47:46,054 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1684 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:47:46,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 46 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:47:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-03-19 07:47:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 215. [2022-03-19 07:47:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-03-19 07:47:46,309 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2022-03-19 07:47:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:47:46,309 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-03-19 07:47:46,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:47:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-03-19 07:47:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-03-19 07:47:46,310 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:47:46,310 INFO L500 BasicCegarLoop]: trace histogram [97, 97, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:47:46,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-19 07:47:46,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-19 07:47:46,523 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:47:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:47:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2033446161, now seen corresponding path program 195 times [2022-03-19 07:47:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:47:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200769723] [2022-03-19 07:47:46,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:47:46,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:47:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2033446161, now seen corresponding path program 196 times [2022-03-19 07:47:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:47:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306166011] [2022-03-19 07:47:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:47:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:47:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat