/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:57:19,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:57:19,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:57:19,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:57:19,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:57:19,624 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:57:19,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:57:19,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:57:19,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:57:19,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:57:19,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:57:19,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:57:19,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:57:19,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:57:19,626 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:57:19,627 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:57:19,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:57:19,627 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:57:19,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:57:19,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:57:19,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:57:19,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:57:19,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:57:19,828 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:57:19,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-18 00:57:19,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c0ecfa83/b69d80a5562845d8bea790fc39b2a8bf/FLAG05d07317b [2022-03-18 00:57:20,265 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:57:20,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-18 00:57:20,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c0ecfa83/b69d80a5562845d8bea790fc39b2a8bf/FLAG05d07317b [2022-03-18 00:57:20,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c0ecfa83/b69d80a5562845d8bea790fc39b2a8bf [2022-03-18 00:57:20,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:57:20,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:57:20,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:57:20,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:57:20,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:57:20,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e822ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20, skipping insertion in model container [2022-03-18 00:57:20,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:57:20,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:57:20,434 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-18 00:57:20,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:57:20,460 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:57:20,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-18 00:57:20,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:57:20,482 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:57:20,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20 WrapperNode [2022-03-18 00:57:20,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:57:20,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:57:20,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:57:20,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:57:20,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:57:20,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:57:20,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:57:20,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:57:20,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (1/1) ... [2022-03-18 00:57:20,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:57:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:20,544 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) [2022-03-18 00:57:20,565 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 [2022-03-18 00:57:20,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:57:20,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:57:20,582 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:57:20,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:57:20,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:57:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:57:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:57:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:57:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:57:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:57:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:57:20,633 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:57:20,635 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:57:20,695 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:57:20,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:57:20,703 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:57:20,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:57:20 BoogieIcfgContainer [2022-03-18 00:57:20,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:57:20,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:57:20,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:57:20,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:57:20,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:57:20" (1/3) ... [2022-03-18 00:57:20,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff632e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:57:20, skipping insertion in model container [2022-03-18 00:57:20,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:20" (2/3) ... [2022-03-18 00:57:20,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff632e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:57:20, skipping insertion in model container [2022-03-18 00:57:20,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:57:20" (3/3) ... [2022-03-18 00:57:20,717 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-03-18 00:57:20,721 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:57:20,722 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:57:20,755 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:57:20,760 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 [2022-03-18 00:57:20,760 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:57:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-18 00:57:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:57:20,779 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:20,779 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:20,780 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-18 00:57:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:20,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29377199] [2022-03-18 00:57:20,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:57:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-03-18 00:57:20,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:20,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358517865] [2022-03-18 00:57:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:20,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:20,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:20,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358517865] [2022-03-18 00:57:20,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358517865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:20,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:20,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:57:20,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:20,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29377199] [2022-03-18 00:57:20,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29377199] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:20,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:20,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:57:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777851166] [2022-03-18 00:57:20,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:20,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:57:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:57:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:57:21,006 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:21,035 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 00:57:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:57:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 00:57:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:21,042 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:57:21,042 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 00:57:21,045 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 [2022-03-18 00:57:21,047 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-03-18 00:57:21,048 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 00:57:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 00:57:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 00:57:21,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 00:57:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:21,074 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 00:57:21,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 00:57:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:57:21,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:21,075 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:21,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:57:21,075 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:21,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-18 00:57:21,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335870592] [2022-03-18 00:57:21,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:57:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-18 00:57:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:21,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579583982] [2022-03-18 00:57:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:21,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:21,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:21,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:21,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579583982] [2022-03-18 00:57:21,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579583982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:21,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:21,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:57:21,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:21,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335870592] [2022-03-18 00:57:21,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335870592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:21,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:21,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:57:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33691146] [2022-03-18 00:57:21,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:21,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:57:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:57:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:57:21,140 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:21,168 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 00:57:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:57:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 00:57:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:21,170 INFO L225 Difference]: With dead ends: 22 [2022-03-18 00:57:21,170 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 00:57:21,170 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:57:21,171 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:21,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 00:57:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 00:57:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 00:57:21,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 00:57:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:21,177 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 00:57:21,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 00:57:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:57:21,178 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:21,178 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:21,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:57:21,178 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-18 00:57:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532208943] [2022-03-18 00:57:21,277 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:57:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-18 00:57:21,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:21,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821779708] [2022-03-18 00:57:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:21,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:21,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821779708] [2022-03-18 00:57:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821779708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:21,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:21,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:57:21,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:21,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532208943] [2022-03-18 00:57:21,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532208943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:21,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:21,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:57:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273979398] [2022-03-18 00:57:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:21,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:57:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:57:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:57:21,362 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-03-18 00:57:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:21,436 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-18 00:57:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:57:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2022-03-18 00:57:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:21,438 INFO L225 Difference]: With dead ends: 22 [2022-03-18 00:57:21,438 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:57:21,439 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:57:21,442 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:21,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:57:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 00:57:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2022-03-18 00:57:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 00:57:21,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-18 00:57:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:21,462 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 00:57:21,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-03-18 00:57:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 00:57:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:57:21,463 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:21,463 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:21,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:57:21,465 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-03-18 00:57:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:21,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2086476342] [2022-03-18 00:57:26,135 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1150048112, now seen corresponding path program 1 times [2022-03-18 00:57:26,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:26,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192898691] [2022-03-18 00:57:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:26,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:26,150 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:26,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 2 times [2022-03-18 00:57:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:26,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158365020] [2022-03-18 00:57:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:26,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:26,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:26,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158365020] [2022-03-18 00:57:26,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158365020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:26,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890215768] [2022-03-18 00:57:26,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:26,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:26,248 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) [2022-03-18 00:57:26,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:57:26,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:26,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:26,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 00:57:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:26,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:26,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890215768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:26,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:26,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 00:57:26,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:26,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2086476342] [2022-03-18 00:57:26,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2086476342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:26,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:26,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:57:26,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803629003] [2022-03-18 00:57:26,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:26,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:57:26,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:57:26,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:57:26,420 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:26,468 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-18 00:57:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:57:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 00:57:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:26,471 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:57:26,471 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 00:57:26,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:57:26,476 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:26,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 00:57:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 00:57:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2022-03-18 00:57:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-18 00:57:26,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-18 00:57:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:26,481 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-18 00:57:26,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-18 00:57:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:57:26,481 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:26,481 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:26,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:26,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:26,684 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 3 times [2022-03-18 00:57:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:26,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108714318] [2022-03-18 00:57:26,924 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1090942768, now seen corresponding path program 1 times [2022-03-18 00:57:26,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:26,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373760149] [2022-03-18 00:57:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:26,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:26,932 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:26,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 4 times [2022-03-18 00:57:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38348041] [2022-03-18 00:57:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:26,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:26,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:26,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38348041] [2022-03-18 00:57:26,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38348041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:26,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344576022] [2022-03-18 00:57:26,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:26,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:26,984 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) [2022-03-18 00:57:26,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:57:27,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:27,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:27,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:27,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344576022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:27,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:27,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 00:57:27,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108714318] [2022-03-18 00:57:27,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108714318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:27,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:27,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:57:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286493157] [2022-03-18 00:57:27,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:27,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:57:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:57:27,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:57:27,092 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:27,144 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-18 00:57:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:57:27,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 00:57:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:27,146 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:57:27,146 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 00:57:27,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:57:27,147 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:27,147 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 00:57:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-18 00:57:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2022-03-18 00:57:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-18 00:57:27,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-03-18 00:57:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:27,152 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-18 00:57:27,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-18 00:57:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:57:27,152 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:27,152 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:27,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:27,365 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,SelfDestructingSolverStorable6,SelfDestructingSolverStorable5 [2022-03-18 00:57:27,366 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 5 times [2022-03-18 00:57:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:27,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229988808] [2022-03-18 00:57:27,590 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1031837424, now seen corresponding path program 1 times [2022-03-18 00:57:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:27,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251260698] [2022-03-18 00:57:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:27,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:27,597 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:27,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 6 times [2022-03-18 00:57:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:27,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407749069] [2022-03-18 00:57:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:27,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407749069] [2022-03-18 00:57:27,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407749069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71480514] [2022-03-18 00:57:27,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:27,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:27,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:27,652 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) [2022-03-18 00:57:27,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:57:27,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:57:27,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:57:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:57:27,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:57:27,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71480514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:27,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:27,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-18 00:57:27,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:27,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229988808] [2022-03-18 00:57:27,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229988808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:27,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:27,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:57:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484670239] [2022-03-18 00:57:27,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:27,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:57:27,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:57:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:57:27,802 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-03-18 00:57:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:27,866 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-18 00:57:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:57:27,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 00:57:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:27,867 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:57:27,867 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:57:27,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:57:27,868 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:27,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:57:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 00:57:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-18 00:57:27,871 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-03-18 00:57:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:27,872 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-18 00:57:27,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-03-18 00:57:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-18 00:57:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:57:27,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:27,872 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:27,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:28,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:28,083 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:28,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 7 times [2022-03-18 00:57:28,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:28,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190929984] [2022-03-18 00:57:28,278 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -972732080, now seen corresponding path program 1 times [2022-03-18 00:57:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394581057] [2022-03-18 00:57:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:28,286 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:28,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 8 times [2022-03-18 00:57:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301723218] [2022-03-18 00:57:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:28,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:28,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301723218] [2022-03-18 00:57:28,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301723218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:28,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869913757] [2022-03-18 00:57:28,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:28,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:28,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:28,388 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) [2022-03-18 00:57:28,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:57:28,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:57:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:28,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:28,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869913757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:28,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:28,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:57:28,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:28,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190929984] [2022-03-18 00:57:28,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190929984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:28,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:28,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:57:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483997562] [2022-03-18 00:57:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:28,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:57:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:57:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:57:28,536 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:28,598 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 00:57:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:57:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have 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 [2022-03-18 00:57:28,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:28,599 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:57:28,599 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 00:57:28,600 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:57:28,601 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:28,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 00:57:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 00:57:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-18 00:57:28,610 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-03-18 00:57:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:28,611 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-18 00:57:28,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-18 00:57:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:57:28,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:28,613 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:28,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:28,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:28,827 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2118192751, now seen corresponding path program 9 times [2022-03-18 00:57:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:28,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032430242] [2022-03-18 00:57:29,022 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash -913626736, now seen corresponding path program 1 times [2022-03-18 00:57:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:29,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401819860] [2022-03-18 00:57:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:29,028 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:29,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2118192751, now seen corresponding path program 10 times [2022-03-18 00:57:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580098402] [2022-03-18 00:57:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:29,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:29,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:29,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580098402] [2022-03-18 00:57:29,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580098402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651511739] [2022-03-18 00:57:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:29,121 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) [2022-03-18 00:57:29,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:57:29,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:29,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:57:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:29,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651511739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:29,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:29,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 00:57:29,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032430242] [2022-03-18 00:57:29,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032430242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:29,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:29,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:57:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594816557] [2022-03-18 00:57:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:29,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:57:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:57:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:57:29,285 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:29,352 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 00:57:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:57:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 00:57:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:29,353 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:57:29,353 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:57:29,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:57:29,354 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:29,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:57:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 00:57:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-03-18 00:57:29,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2022-03-18 00:57:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:29,358 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-03-18 00:57:29,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-03-18 00:57:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:57:29,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:29,358 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:29,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:29,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11,SelfDestructingSolverStorable12 [2022-03-18 00:57:29,572 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1681119820, now seen corresponding path program 11 times [2022-03-18 00:57:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:29,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210785201] [2022-03-18 00:57:29,780 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash -854521392, now seen corresponding path program 1 times [2022-03-18 00:57:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072825069] [2022-03-18 00:57:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:29,785 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:29,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1681119820, now seen corresponding path program 12 times [2022-03-18 00:57:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:29,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780039439] [2022-03-18 00:57:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:29,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:29,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780039439] [2022-03-18 00:57:29,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780039439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403922964] [2022-03-18 00:57:29,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:29,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:29,854 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) [2022-03-18 00:57:29,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:57:29,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:57:29,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:57:29,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:57:30,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403922964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:30,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:30,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2022-03-18 00:57:30,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210785201] [2022-03-18 00:57:30,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210785201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:30,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:30,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:57:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065342606] [2022-03-18 00:57:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:30,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:57:30,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:57:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:57:30,043 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:30,130 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-18 00:57:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:57:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 00:57:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:30,131 INFO L225 Difference]: With dead ends: 36 [2022-03-18 00:57:30,131 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 00:57:30,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=336, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:57:30,134 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:30,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 00:57:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-18 00:57:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-18 00:57:30,140 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-03-18 00:57:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:30,142 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-18 00:57:30,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-18 00:57:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:57:30,143 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:30,143 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:30,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:30,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 00:57:30,359 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1734139159, now seen corresponding path program 13 times [2022-03-18 00:57:30,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:30,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1334739699] [2022-03-18 00:57:30,527 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -795416048, now seen corresponding path program 1 times [2022-03-18 00:57:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:30,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372774960] [2022-03-18 00:57:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:30,532 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:30,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1734139159, now seen corresponding path program 14 times [2022-03-18 00:57:30,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:30,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038492604] [2022-03-18 00:57:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:30,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:30,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:30,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038492604] [2022-03-18 00:57:30,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038492604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:30,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213038939] [2022-03-18 00:57:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:30,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:30,593 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) [2022-03-18 00:57:30,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:57:30,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:30,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:30,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:57:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:30,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213038939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:30,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:30,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 00:57:30,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1334739699] [2022-03-18 00:57:30,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1334739699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:30,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:30,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:57:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226782348] [2022-03-18 00:57:30,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:30,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:57:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:57:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:57:30,810 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:30,909 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-03-18 00:57:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:57:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 00:57:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:30,910 INFO L225 Difference]: With dead ends: 38 [2022-03-18 00:57:30,911 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 00:57:30,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:57:30,911 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:30,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 00:57:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 00:57:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-18 00:57:30,922 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2022-03-18 00:57:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:30,923 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-18 00:57:30,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-18 00:57:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:57:30,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:30,925 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:30,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:31,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:31,141 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1851963462, now seen corresponding path program 15 times [2022-03-18 00:57:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769726539] [2022-03-18 00:57:31,345 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -736310704, now seen corresponding path program 1 times [2022-03-18 00:57:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751865515] [2022-03-18 00:57:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:31,350 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:31,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:31,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1851963462, now seen corresponding path program 16 times [2022-03-18 00:57:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:31,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421369068] [2022-03-18 00:57:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:31,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:31,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421369068] [2022-03-18 00:57:31,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421369068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:31,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648913515] [2022-03-18 00:57:31,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:31,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:31,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:31,422 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) [2022-03-18 00:57:31,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:57:31,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:31,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 00:57:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:31,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:31,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648913515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:31,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:31,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 00:57:31,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769726539] [2022-03-18 00:57:31,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769726539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:31,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:31,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:57:31,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782291854] [2022-03-18 00:57:31,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:31,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:57:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:57:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:57:31,636 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:31,746 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-18 00:57:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:57:31,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 00:57:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:31,747 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:57:31,747 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:57:31,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:57:31,748 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:31,748 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:57:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 00:57:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-18 00:57:31,751 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-18 00:57:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:31,751 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-18 00:57:31,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-18 00:57:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:57:31,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:31,752 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:31,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:31,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 00:57:31,964 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash -762156445, now seen corresponding path program 17 times [2022-03-18 00:57:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:31,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2071856823] [2022-03-18 00:57:32,153 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash -677205360, now seen corresponding path program 1 times [2022-03-18 00:57:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:32,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893466620] [2022-03-18 00:57:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:32,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:32,157 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:32,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -762156445, now seen corresponding path program 18 times [2022-03-18 00:57:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:32,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645587046] [2022-03-18 00:57:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:32,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:32,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645587046] [2022-03-18 00:57:32,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645587046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472497988] [2022-03-18 00:57:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:32,239 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) [2022-03-18 00:57:32,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:57:32,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:32,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 00:57:32,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 00:57:32,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472497988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:32,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:32,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-03-18 00:57:32,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:32,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2071856823] [2022-03-18 00:57:32,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2071856823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:32,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:32,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:57:32,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417443377] [2022-03-18 00:57:32,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:32,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:57:32,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:57:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:57:32,362 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:32,493 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-18 00:57:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:57:32,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 00:57:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:32,503 INFO L225 Difference]: With dead ends: 42 [2022-03-18 00:57:32,503 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:57:32,503 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=410, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:57:32,504 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:32,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:57:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 00:57:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-03-18 00:57:32,511 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2022-03-18 00:57:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:32,511 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-03-18 00:57:32,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-03-18 00:57:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 00:57:32,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:32,512 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:32,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:32,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:32,712 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash -375518912, now seen corresponding path program 19 times [2022-03-18 00:57:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:32,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064583156] [2022-03-18 00:57:32,880 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash -618100016, now seen corresponding path program 1 times [2022-03-18 00:57:32,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:32,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593077286] [2022-03-18 00:57:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:32,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:32,885 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:32,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -375518912, now seen corresponding path program 20 times [2022-03-18 00:57:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:32,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904066770] [2022-03-18 00:57:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:32,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904066770] [2022-03-18 00:57:32,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904066770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446471162] [2022-03-18 00:57:32,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:32,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:32,978 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) [2022-03-18 00:57:32,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:57:33,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:57:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446471162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:33,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:33,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 00:57:33,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064583156] [2022-03-18 00:57:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064583156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:33,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:33,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:57:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698030358] [2022-03-18 00:57:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:33,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:57:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:57:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:57:33,249 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:33,366 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-18 00:57:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:57:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 00:57:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:33,367 INFO L225 Difference]: With dead ends: 44 [2022-03-18 00:57:33,367 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 00:57:33,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:57:33,368 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:33,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 00:57:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 00:57:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-18 00:57:33,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2022-03-18 00:57:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:33,372 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-18 00:57:33,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-18 00:57:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:57:33,372 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:33,372 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:33,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:33,573 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,SelfDestructingSolverStorable21,SelfDestructingSolverStorable22 [2022-03-18 00:57:33,573 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1815962845, now seen corresponding path program 21 times [2022-03-18 00:57:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835460434] [2022-03-18 00:57:33,768 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash -558994672, now seen corresponding path program 1 times [2022-03-18 00:57:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:33,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381148418] [2022-03-18 00:57:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:33,772 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:33,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1815962845, now seen corresponding path program 22 times [2022-03-18 00:57:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:33,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242211706] [2022-03-18 00:57:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:33,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:33,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:33,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242211706] [2022-03-18 00:57:33,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242211706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:33,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101133436] [2022-03-18 00:57:33,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:33,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:33,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:33,873 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) [2022-03-18 00:57:33,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:57:33,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:33,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:57:33,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:33,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:34,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101133436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:34,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:34,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-18 00:57:34,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835460434] [2022-03-18 00:57:34,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835460434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:34,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:34,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:57:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674852548] [2022-03-18 00:57:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:34,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:57:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:57:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:57:34,172 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:34,307 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-18 00:57:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:57:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 00:57:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:34,308 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:57:34,308 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:57:34,309 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:57:34,309 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:34,309 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:57:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 00:57:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-03-18 00:57:34,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2022-03-18 00:57:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:34,321 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-03-18 00:57:34,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-03-18 00:57:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:57:34,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:34,321 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:34,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 00:57:34,535 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,SelfDestructingSolverStorable23,SelfDestructingSolverStorable24 [2022-03-18 00:57:34,535 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -999011014, now seen corresponding path program 23 times [2022-03-18 00:57:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:34,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2064964345] [2022-03-18 00:57:34,682 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -499889328, now seen corresponding path program 1 times [2022-03-18 00:57:34,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:34,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147635998] [2022-03-18 00:57:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:34,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:34,686 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:34,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash -999011014, now seen corresponding path program 24 times [2022-03-18 00:57:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:34,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719731613] [2022-03-18 00:57:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:34,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:34,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719731613] [2022-03-18 00:57:34,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719731613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457631150] [2022-03-18 00:57:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:34,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:34,799 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) [2022-03-18 00:57:34,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:57:34,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 00:57:34,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 00:57:34,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457631150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:34,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:34,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-03-18 00:57:34,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:34,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2064964345] [2022-03-18 00:57:34,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2064964345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:34,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:34,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:57:34,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235711050] [2022-03-18 00:57:34,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:34,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:57:34,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:57:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:57:34,965 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:35,113 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-18 00:57:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:57:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 00:57:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:35,114 INFO L225 Difference]: With dead ends: 48 [2022-03-18 00:57:35,114 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:57:35,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=433, Invalid=623, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:57:35,115 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:35,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:57:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 00:57:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-03-18 00:57:35,119 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2022-03-18 00:57:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:35,119 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-03-18 00:57:35,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-03-18 00:57:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 00:57:35,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:35,120 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:35,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:35,327 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,SelfDestructingSolverStorable25,SelfDestructingSolverStorable26 [2022-03-18 00:57:35,327 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash -359493033, now seen corresponding path program 25 times [2022-03-18 00:57:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:35,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651026551] [2022-03-18 00:57:35,519 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -440783984, now seen corresponding path program 1 times [2022-03-18 00:57:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:35,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376280811] [2022-03-18 00:57:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:35,523 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:35,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash -359493033, now seen corresponding path program 26 times [2022-03-18 00:57:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:35,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993603493] [2022-03-18 00:57:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:35,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:35,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993603493] [2022-03-18 00:57:35,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993603493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824432871] [2022-03-18 00:57:35,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:35,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:35,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:35,650 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) [2022-03-18 00:57:35,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:57:35,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:35,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:35,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:57:35,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:36,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824432871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:36,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:36,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 00:57:36,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:36,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651026551] [2022-03-18 00:57:36,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651026551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:36,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:36,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:57:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218639999] [2022-03-18 00:57:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:36,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:57:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:36,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:57:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:57:36,014 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:36,181 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-03-18 00:57:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:57:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-18 00:57:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:36,182 INFO L225 Difference]: With dead ends: 50 [2022-03-18 00:57:36,182 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 00:57:36,190 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:57:36,191 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:36,191 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 00:57:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 00:57:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-03-18 00:57:36,200 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2022-03-18 00:57:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:36,201 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-03-18 00:57:36,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-03-18 00:57:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:57:36,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:36,203 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:36,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 00:57:36,422 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,SelfDestructingSolverStorable27,SelfDestructingSolverStorable28 [2022-03-18 00:57:36,422 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash 36963380, now seen corresponding path program 27 times [2022-03-18 00:57:36,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:36,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356073741] [2022-03-18 00:57:36,608 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:36,609 INFO L85 PathProgramCache]: Analyzing trace with hash -381678640, now seen corresponding path program 1 times [2022-03-18 00:57:36,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:36,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608814745] [2022-03-18 00:57:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:36,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:36,612 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:36,616 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash 36963380, now seen corresponding path program 28 times [2022-03-18 00:57:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:36,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843351686] [2022-03-18 00:57:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:36,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:36,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843351686] [2022-03-18 00:57:36,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843351686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705240731] [2022-03-18 00:57:36,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:36,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:36,731 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) [2022-03-18 00:57:36,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:57:36,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 00:57:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:37,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705240731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:37,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:37,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 00:57:37,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:37,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356073741] [2022-03-18 00:57:37,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356073741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:37,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:37,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:57:37,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066928226] [2022-03-18 00:57:37,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:37,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:57:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:57:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:57:37,104 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:37,286 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-18 00:57:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:57:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 00:57:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:37,287 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:57:37,287 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:57:37,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:57:37,288 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:37,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:57:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 00:57:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-03-18 00:57:37,291 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2022-03-18 00:57:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:37,292 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-03-18 00:57:37,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-03-18 00:57:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 00:57:37,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:37,292 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:37,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:37,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:37,503 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1220513071, now seen corresponding path program 29 times [2022-03-18 00:57:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:37,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384394494] [2022-03-18 00:57:37,669 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash -322573296, now seen corresponding path program 1 times [2022-03-18 00:57:37,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:37,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446547991] [2022-03-18 00:57:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:37,673 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:37,676 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1220513071, now seen corresponding path program 30 times [2022-03-18 00:57:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:37,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119812728] [2022-03-18 00:57:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:37,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:37,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:37,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119812728] [2022-03-18 00:57:37,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119812728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:37,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282725542] [2022-03-18 00:57:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:37,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:37,812 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) [2022-03-18 00:57:37,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:57:37,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:37,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:37,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:57:37,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:57:37,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282725542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:37,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:37,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-18 00:57:37,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384394494] [2022-03-18 00:57:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384394494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:37,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:37,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:57:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586292089] [2022-03-18 00:57:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:37,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:57:37,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:57:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:57:37,960 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:38,157 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-18 00:57:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:57:38,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 00:57:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:38,158 INFO L225 Difference]: With dead ends: 54 [2022-03-18 00:57:38,158 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:57:38,159 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=601, Invalid=881, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:57:38,159 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:38,159 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:57:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-18 00:57:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-03-18 00:57:38,163 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2022-03-18 00:57:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:38,163 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-03-18 00:57:38,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-03-18 00:57:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 00:57:38,164 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:38,164 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:38,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:38,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:38,382 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1525394990, now seen corresponding path program 31 times [2022-03-18 00:57:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:38,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1342568082] [2022-03-18 00:57:38,571 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash -263467952, now seen corresponding path program 1 times [2022-03-18 00:57:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:38,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308350224] [2022-03-18 00:57:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:38,574 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:38,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1525394990, now seen corresponding path program 32 times [2022-03-18 00:57:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:38,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612335601] [2022-03-18 00:57:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:38,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:38,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612335601] [2022-03-18 00:57:38,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612335601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:38,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92893634] [2022-03-18 00:57:38,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:38,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:38,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:38,726 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) [2022-03-18 00:57:38,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:57:38,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:57:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:38,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:39,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92893634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:39,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:39,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-18 00:57:39,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1342568082] [2022-03-18 00:57:39,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1342568082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:39,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:39,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:57:39,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599914602] [2022-03-18 00:57:39,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:39,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:57:39,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:57:39,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:57:39,166 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:39,372 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-03-18 00:57:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:57:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 00:57:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:39,373 INFO L225 Difference]: With dead ends: 56 [2022-03-18 00:57:39,373 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 00:57:39,374 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:57:39,374 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:39,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 00:57:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-18 00:57:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-03-18 00:57:39,377 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2022-03-18 00:57:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:39,377 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-03-18 00:57:39,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-03-18 00:57:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:57:39,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:39,378 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:39,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:39,580 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,SelfDestructingSolverStorable33,SelfDestructingSolverStorable34 [2022-03-18 00:57:39,580 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1061845429, now seen corresponding path program 33 times [2022-03-18 00:57:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:39,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339531671] [2022-03-18 00:57:39,767 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash -204362608, now seen corresponding path program 1 times [2022-03-18 00:57:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856427013] [2022-03-18 00:57:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:39,771 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:39,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1061845429, now seen corresponding path program 34 times [2022-03-18 00:57:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684853234] [2022-03-18 00:57:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:39,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684853234] [2022-03-18 00:57:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684853234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:39,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639087917] [2022-03-18 00:57:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:39,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:39,935 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) [2022-03-18 00:57:39,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:57:39,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:39,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:57:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:40,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639087917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:40,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:40,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-18 00:57:40,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339531671] [2022-03-18 00:57:40,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339531671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:40,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:40,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:57:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37469188] [2022-03-18 00:57:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:40,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:57:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:57:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:57:40,427 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:40,653 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-03-18 00:57:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:57:40,653 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-18 00:57:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:40,654 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:57:40,654 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:57:40,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:57:40,656 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:40,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 44 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:57:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 00:57:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-03-18 00:57:40,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2022-03-18 00:57:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:40,672 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-03-18 00:57:40,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-03-18 00:57:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 00:57:40,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:40,673 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:40,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:40,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-18 00:57:40,874 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash -613823704, now seen corresponding path program 35 times [2022-03-18 00:57:40,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:40,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047146961] [2022-03-18 00:57:41,042 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash -145257264, now seen corresponding path program 1 times [2022-03-18 00:57:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365662792] [2022-03-18 00:57:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:41,053 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:41,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash -613823704, now seen corresponding path program 36 times [2022-03-18 00:57:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:41,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227743409] [2022-03-18 00:57:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:41,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:41,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227743409] [2022-03-18 00:57:41,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227743409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527112195] [2022-03-18 00:57:41,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:41,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:41,217 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) [2022-03-18 00:57:41,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:57:41,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-18 00:57:41,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-18 00:57:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527112195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:41,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:41,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-03-18 00:57:41,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047146961] [2022-03-18 00:57:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047146961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:41,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:41,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:57:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314378963] [2022-03-18 00:57:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:41,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:57:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:57:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:57:41,415 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:41,644 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-18 00:57:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:57:41,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-18 00:57:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:41,645 INFO L225 Difference]: With dead ends: 60 [2022-03-18 00:57:41,645 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:57:41,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:57:41,646 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:41,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:57:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:57:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-18 00:57:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-03-18 00:57:41,650 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2022-03-18 00:57:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:41,650 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-03-18 00:57:41,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-03-18 00:57:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 00:57:41,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:41,651 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:41,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:41,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37,SelfDestructingSolverStorable38 [2022-03-18 00:57:41,867 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash 438324421, now seen corresponding path program 37 times [2022-03-18 00:57:41,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:41,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309949780] [2022-03-18 00:57:42,054 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash -86151920, now seen corresponding path program 1 times [2022-03-18 00:57:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:42,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097934558] [2022-03-18 00:57:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:42,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:42,058 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:42,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash 438324421, now seen corresponding path program 38 times [2022-03-18 00:57:42,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:42,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875416399] [2022-03-18 00:57:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:42,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:42,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:42,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875416399] [2022-03-18 00:57:42,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875416399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:42,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087817670] [2022-03-18 00:57:42,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:42,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:42,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:42,222 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) [2022-03-18 00:57:42,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:57:42,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:42,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:57:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:42,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:42,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087817670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:42,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:42,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-18 00:57:42,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:42,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309949780] [2022-03-18 00:57:42,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309949780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:42,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:42,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:57:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654592276] [2022-03-18 00:57:42,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:42,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:57:42,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:57:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:57:42,766 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:43,027 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-03-18 00:57:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:57:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-18 00:57:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:43,028 INFO L225 Difference]: With dead ends: 62 [2022-03-18 00:57:43,028 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 00:57:43,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:57:43,029 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:43,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 00:57:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 00:57:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-03-18 00:57:43,032 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2022-03-18 00:57:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:43,032 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-03-18 00:57:43,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-03-18 00:57:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:57:43,033 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:43,033 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:43,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:43,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 00:57:43,247 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2059609310, now seen corresponding path program 39 times [2022-03-18 00:57:43,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:43,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2104784883] [2022-03-18 00:57:43,418 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -27046576, now seen corresponding path program 1 times [2022-03-18 00:57:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417044224] [2022-03-18 00:57:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:43,421 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:43,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2059609310, now seen corresponding path program 40 times [2022-03-18 00:57:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158247260] [2022-03-18 00:57:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:43,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:43,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158247260] [2022-03-18 00:57:43,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158247260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:43,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325682154] [2022-03-18 00:57:43,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:43,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:43,614 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) [2022-03-18 00:57:43,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:57:43,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:43,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:57:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:43,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:44,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325682154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:44,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:44,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-18 00:57:44,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2104784883] [2022-03-18 00:57:44,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2104784883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:44,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:44,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:57:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956570304] [2022-03-18 00:57:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:44,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:57:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:57:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:57:44,208 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:44,487 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-03-18 00:57:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:57:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-18 00:57:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:44,489 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:57:44,489 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:57:44,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:57:44,490 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:44,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:57:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 00:57:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-03-18 00:57:44,494 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2022-03-18 00:57:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:44,494 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-03-18 00:57:44,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-03-18 00:57:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 00:57:44,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:44,494 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:44,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:57:44,703 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,SelfDestructingSolverStorable41,SelfDestructingSolverStorable42 [2022-03-18 00:57:44,703 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1687206337, now seen corresponding path program 41 times [2022-03-18 00:57:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [460610127] [2022-03-18 00:57:44,901 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash 32058768, now seen corresponding path program 1 times [2022-03-18 00:57:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:44,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118103568] [2022-03-18 00:57:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:44,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:44,905 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:44,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1687206337, now seen corresponding path program 42 times [2022-03-18 00:57:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061664085] [2022-03-18 00:57:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061664085] [2022-03-18 00:57:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061664085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804947354] [2022-03-18 00:57:45,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:45,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:45,101 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) [2022-03-18 00:57:45,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:57:45,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:57:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:57:45,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804947354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:45,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:45,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-03-18 00:57:45,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [460610127] [2022-03-18 00:57:45,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [460610127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:45,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:45,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:57:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491457065] [2022-03-18 00:57:45,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:45,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:57:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:45,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:57:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:57:45,307 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:45,591 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-03-18 00:57:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:57:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-18 00:57:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:45,591 INFO L225 Difference]: With dead ends: 66 [2022-03-18 00:57:45,591 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:57:45,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1018, Invalid=1532, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:57:45,593 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:45,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:57:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-18 00:57:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-03-18 00:57:45,596 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-03-18 00:57:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:45,596 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-03-18 00:57:45,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-03-18 00:57:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 00:57:45,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:45,597 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:45,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 00:57:45,797 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,SelfDestructingSolverStorable43,SelfDestructingSolverStorable44 [2022-03-18 00:57:45,797 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash -290234852, now seen corresponding path program 43 times [2022-03-18 00:57:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:45,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839215147] [2022-03-18 00:57:46,012 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:46,013 INFO L85 PathProgramCache]: Analyzing trace with hash 91164112, now seen corresponding path program 1 times [2022-03-18 00:57:46,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:46,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659627877] [2022-03-18 00:57:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:46,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:46,016 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:46,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -290234852, now seen corresponding path program 44 times [2022-03-18 00:57:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423370805] [2022-03-18 00:57:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:46,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:46,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423370805] [2022-03-18 00:57:46,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423370805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:46,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210118083] [2022-03-18 00:57:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:46,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:46,224 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) [2022-03-18 00:57:46,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:57:46,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:46,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:57:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:46,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:46,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210118083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:46,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:46,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 00:57:46,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:46,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839215147] [2022-03-18 00:57:46,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839215147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:46,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:46,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:57:46,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522059165] [2022-03-18 00:57:46,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:46,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:57:46,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:57:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:57:46,888 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:47,201 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-03-18 00:57:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:57:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-18 00:57:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:47,202 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:57:47,202 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 00:57:47,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:57:47,204 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:47,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 00:57:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-18 00:57:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-03-18 00:57:47,208 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2022-03-18 00:57:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:47,208 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-03-18 00:57:47,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-03-18 00:57:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:57:47,209 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:47,209 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:47,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 00:57:47,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,SelfDestructingSolverStorable46,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:47,422 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:47,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2125401415, now seen corresponding path program 45 times [2022-03-18 00:57:47,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:47,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009003936] [2022-03-18 00:57:47,558 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash 150269456, now seen corresponding path program 1 times [2022-03-18 00:57:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:47,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14393061] [2022-03-18 00:57:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:47,561 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:47,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2125401415, now seen corresponding path program 46 times [2022-03-18 00:57:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:47,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242355179] [2022-03-18 00:57:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:47,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:47,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242355179] [2022-03-18 00:57:47,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242355179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086019549] [2022-03-18 00:57:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:47,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:47,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:47,824 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) [2022-03-18 00:57:47,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:57:47,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:47,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:47,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 00:57:47,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:47,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086019549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:48,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-18 00:57:48,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009003936] [2022-03-18 00:57:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009003936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:48,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:57:48,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507364205] [2022-03-18 00:57:48,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:48,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:57:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:57:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:57:48,552 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:48,858 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-03-18 00:57:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:57:48,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-18 00:57:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:48,860 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:57:48,860 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:57:48,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:57:48,862 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:48,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:57:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-18 00:57:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-18 00:57:48,865 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2022-03-18 00:57:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:48,865 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-18 00:57:48,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-18 00:57:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 00:57:48,865 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:48,865 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:48,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 00:57:49,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:49,075 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash -488909802, now seen corresponding path program 47 times [2022-03-18 00:57:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374565305] [2022-03-18 00:57:49,270 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 209374800, now seen corresponding path program 1 times [2022-03-18 00:57:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:49,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672199278] [2022-03-18 00:57:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:49,274 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:49,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -488909802, now seen corresponding path program 48 times [2022-03-18 00:57:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493843164] [2022-03-18 00:57:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:49,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:49,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493843164] [2022-03-18 00:57:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493843164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043039523] [2022-03-18 00:57:49,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:49,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:49,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:49,534 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) [2022-03-18 00:57:49,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:57:49,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:49,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:49,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-18 00:57:49,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-18 00:57:49,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043039523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:49,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:49,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-03-18 00:57:49,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:49,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374565305] [2022-03-18 00:57:49,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374565305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:49,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:49,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:57:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046610735] [2022-03-18 00:57:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:49,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:57:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:57:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:57:49,748 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:50,074 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-03-18 00:57:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:57:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-18 00:57:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:50,075 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:57:50,075 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:57:50,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1267, Invalid=1925, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:57:50,076 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:50,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:57:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 00:57:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-18 00:57:50,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2022-03-18 00:57:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:50,079 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-18 00:57:50,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-18 00:57:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 00:57:50,080 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:50,080 INFO L500 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:50,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 00:57:50,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 00:57:50,280 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 221499955, now seen corresponding path program 49 times [2022-03-18 00:57:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:50,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [460990600] [2022-03-18 00:57:50,460 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 268480144, now seen corresponding path program 1 times [2022-03-18 00:57:50,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:50,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118814209] [2022-03-18 00:57:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:50,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:50,463 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:50,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash 221499955, now seen corresponding path program 50 times [2022-03-18 00:57:50,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:50,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497004298] [2022-03-18 00:57:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:50,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:50,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:50,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:50,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497004298] [2022-03-18 00:57:50,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497004298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:50,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660766903] [2022-03-18 00:57:50,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:50,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:50,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:50,732 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) [2022-03-18 00:57:50,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:57:50,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:57:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:50,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:51,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660766903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:51,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:51,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-18 00:57:51,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:51,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [460990600] [2022-03-18 00:57:51,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [460990600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:51,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:51,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:57:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099903410] [2022-03-18 00:57:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:51,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:57:51,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:57:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:57:51,610 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:51,958 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-03-18 00:57:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:57:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-18 00:57:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:51,959 INFO L225 Difference]: With dead ends: 74 [2022-03-18 00:57:51,959 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 00:57:51,960 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:57:51,961 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:51,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 00:57:51,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-18 00:57:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-03-18 00:57:51,964 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2022-03-18 00:57:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:51,964 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-03-18 00:57:51,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-03-18 00:57:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:57:51,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:51,964 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:51,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 00:57:52,167 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,SelfDestructingSolverStorable51,SelfDestructingSolverStorable52 [2022-03-18 00:57:52,167 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash 25476368, now seen corresponding path program 51 times [2022-03-18 00:57:52,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:52,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1490209977] [2022-03-18 00:57:52,352 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 327585488, now seen corresponding path program 1 times [2022-03-18 00:57:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:52,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52935092] [2022-03-18 00:57:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:52,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:52,357 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:52,361 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 25476368, now seen corresponding path program 52 times [2022-03-18 00:57:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986239471] [2022-03-18 00:57:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:52,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986239471] [2022-03-18 00:57:52,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986239471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745632182] [2022-03-18 00:57:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:52,670 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) [2022-03-18 00:57:52,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:57:52,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 00:57:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:52,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:53,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745632182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:53,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:53,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-18 00:57:53,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:53,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1490209977] [2022-03-18 00:57:53,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1490209977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:53,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:53,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:57:53,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699296959] [2022-03-18 00:57:53,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:53,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:57:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:53,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:57:53,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:57:53,589 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:53,973 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-18 00:57:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:57:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-18 00:57:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:53,974 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:57:53,974 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 00:57:53,976 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 00:57:53,976 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:53,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 00:57:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-18 00:57:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-03-18 00:57:53,979 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2022-03-18 00:57:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:53,979 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-03-18 00:57:53,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-03-18 00:57:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 00:57:53,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:53,980 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:53,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-18 00:57:54,183 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,SelfDestructingSolverStorable53,SelfDestructingSolverStorable54 [2022-03-18 00:57:54,183 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash 625370285, now seen corresponding path program 53 times [2022-03-18 00:57:54,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:54,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848104279] [2022-03-18 00:57:54,373 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:54,374 INFO L85 PathProgramCache]: Analyzing trace with hash 386690832, now seen corresponding path program 1 times [2022-03-18 00:57:54,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:54,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319604523] [2022-03-18 00:57:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:54,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:54,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:54,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 625370285, now seen corresponding path program 54 times [2022-03-18 00:57:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629415864] [2022-03-18 00:57:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:54,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:54,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629415864] [2022-03-18 00:57:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629415864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831638847] [2022-03-18 00:57:54,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:57:54,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:54,675 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) [2022-03-18 00:57:54,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:57:54,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:57:54,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:54,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:57:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-18 00:57:54,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-18 00:57:54,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831638847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:54,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:54,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-03-18 00:57:54,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:54,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848104279] [2022-03-18 00:57:54,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848104279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:54,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:54,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:57:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514294040] [2022-03-18 00:57:54,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:54,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:57:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:57:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:57:54,920 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:55,314 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-03-18 00:57:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:57:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-18 00:57:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:55,315 INFO L225 Difference]: With dead ends: 78 [2022-03-18 00:57:55,315 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 00:57:55,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1543, Invalid=2363, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:57:55,317 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:55,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 00:57:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 00:57:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-03-18 00:57:55,320 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2022-03-18 00:57:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:55,320 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-03-18 00:57:55,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-03-18 00:57:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 00:57:55,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:55,321 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:55,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-18 00:57:55,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-18 00:57:55,527 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1597806858, now seen corresponding path program 55 times [2022-03-18 00:57:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:55,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117936643] [2022-03-18 00:57:55,722 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash 445796176, now seen corresponding path program 1 times [2022-03-18 00:57:55,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:55,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346791726] [2022-03-18 00:57:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:55,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:55,725 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:55,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1597806858, now seen corresponding path program 56 times [2022-03-18 00:57:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:55,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205834520] [2022-03-18 00:57:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:56,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:56,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:56,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205834520] [2022-03-18 00:57:56,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205834520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:56,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962436728] [2022-03-18 00:57:56,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:57:56,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:56,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:56,032 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) [2022-03-18 00:57:56,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:57:56,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:57:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 00:57:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:56,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:56,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962436728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:56,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:56,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-18 00:57:56,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117936643] [2022-03-18 00:57:56,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117936643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:56,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:56,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:57:56,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108083263] [2022-03-18 00:57:56,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:56,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:57:56,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:57:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:57:56,992 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:57,423 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-03-18 00:57:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:57:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-18 00:57:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:57,424 INFO L225 Difference]: With dead ends: 80 [2022-03-18 00:57:57,424 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 00:57:57,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:57:57,425 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:57,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 00:57:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 00:57:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-03-18 00:57:57,428 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2022-03-18 00:57:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:57,428 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-03-18 00:57:57,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-03-18 00:57:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:57:57,429 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:57,429 INFO L500 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:57,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 00:57:57,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,SelfDestructingSolverStorable58,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:57,635 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash -193517017, now seen corresponding path program 57 times [2022-03-18 00:57:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167668095] [2022-03-18 00:57:57,847 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:57:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash 504901520, now seen corresponding path program 1 times [2022-03-18 00:57:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:57,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101691821] [2022-03-18 00:57:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:57,850 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:57:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:57:57,853 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:57:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -193517017, now seen corresponding path program 58 times [2022-03-18 00:57:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:57:57,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61274179] [2022-03-18 00:57:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:57:57,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:57:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:57:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:57:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:58,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:57:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61274179] [2022-03-18 00:57:58,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61274179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:57:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826248810] [2022-03-18 00:57:58,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:57:58,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:57:58,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:57:58,172 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) [2022-03-18 00:57:58,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:57:58,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:57:58,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:57:58,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 00:57:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:57:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:58,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:57:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:57:59,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826248810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:57:59,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:57:59,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-18 00:57:59,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:57:59,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167668095] [2022-03-18 00:57:59,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167668095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:57:59,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:57:59,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:57:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581456406] [2022-03-18 00:57:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:57:59,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:57:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:57:59,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:57:59,205 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:57:59,678 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-03-18 00:57:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:57:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-18 00:57:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:57:59,679 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:57:59,679 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 00:57:59,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:57:59,681 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:57:59,681 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:57:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 00:57:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-18 00:57:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-03-18 00:57:59,684 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2022-03-18 00:57:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:57:59,685 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-03-18 00:57:59,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:57:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-03-18 00:57:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 00:57:59,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:57:59,685 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:57:59,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 00:57:59,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-18 00:57:59,895 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:57:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:57:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 626124804, now seen corresponding path program 59 times [2022-03-18 00:57:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:57:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270597674] [2022-03-18 00:58:00,078 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash 564006864, now seen corresponding path program 1 times [2022-03-18 00:58:00,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:00,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590901313] [2022-03-18 00:58:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:00,082 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:00,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash 626124804, now seen corresponding path program 60 times [2022-03-18 00:58:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766110483] [2022-03-18 00:58:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:00,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766110483] [2022-03-18 00:58:00,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766110483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866029365] [2022-03-18 00:58:00,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:00,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:00,431 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) [2022-03-18 00:58:00,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:58:00,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:00,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:00,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-18 00:58:00,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-18 00:58:00,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866029365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:00,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:00,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-03-18 00:58:00,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270597674] [2022-03-18 00:58:00,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270597674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:00,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:00,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:58:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032219699] [2022-03-18 00:58:00,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:00,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:58:00,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:58:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:58:00,673 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:01,138 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-03-18 00:58:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:58:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-18 00:58:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:01,138 INFO L225 Difference]: With dead ends: 84 [2022-03-18 00:58:01,138 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:58:01,139 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1846, Invalid=2846, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:58:01,139 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:01,140 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:58:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-18 00:58:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-03-18 00:58:01,143 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2022-03-18 00:58:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:01,143 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-03-18 00:58:01,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-03-18 00:58:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 00:58:01,143 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:01,143 INFO L500 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:01,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:01,344 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,SelfDestructingSolverStorable61,SelfDestructingSolverStorable62 [2022-03-18 00:58:01,344 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1972067679, now seen corresponding path program 61 times [2022-03-18 00:58:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:01,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1895707507] [2022-03-18 00:58:01,533 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash 623112208, now seen corresponding path program 1 times [2022-03-18 00:58:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:01,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113401174] [2022-03-18 00:58:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:01,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:01,536 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:01,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:01,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1972067679, now seen corresponding path program 62 times [2022-03-18 00:58:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:01,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039834528] [2022-03-18 00:58:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:01,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:01,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039834528] [2022-03-18 00:58:01,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039834528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761429921] [2022-03-18 00:58:01,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:01,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:01,901 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) [2022-03-18 00:58:01,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:58:01,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:01,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:58:01,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:02,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761429921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:03,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:03,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-18 00:58:03,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:03,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1895707507] [2022-03-18 00:58:03,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1895707507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:03,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:03,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:58:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028735786] [2022-03-18 00:58:03,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:03,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:58:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:58:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:58:03,007 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:03,516 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-03-18 00:58:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:58:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-18 00:58:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:03,517 INFO L225 Difference]: With dead ends: 86 [2022-03-18 00:58:03,517 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 00:58:03,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:58:03,530 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:03,530 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 00:58:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-18 00:58:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-03-18 00:58:03,533 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2022-03-18 00:58:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:03,534 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-03-18 00:58:03,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-03-18 00:58:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:58:03,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:03,534 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:03,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:03,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,SelfDestructingSolverStorable64,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:03,735 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash 835922430, now seen corresponding path program 63 times [2022-03-18 00:58:03,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:03,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207332403] [2022-03-18 00:58:03,905 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash 682217552, now seen corresponding path program 1 times [2022-03-18 00:58:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:03,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988558558] [2022-03-18 00:58:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:03,914 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:03,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash 835922430, now seen corresponding path program 64 times [2022-03-18 00:58:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986071126] [2022-03-18 00:58:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:04,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:04,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:04,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986071126] [2022-03-18 00:58:04,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986071126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975522260] [2022-03-18 00:58:04,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:04,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:04,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:04,294 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) [2022-03-18 00:58:04,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:58:04,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 00:58:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:04,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975522260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:05,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:05,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 00:58:05,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207332403] [2022-03-18 00:58:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207332403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:05,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:05,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:58:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731215927] [2022-03-18 00:58:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:05,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:58:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:58:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:58:05,550 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:06,043 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-03-18 00:58:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:58:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-18 00:58:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:06,044 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:58:06,044 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 00:58:06,045 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:58:06,046 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:06,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 00:58:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-18 00:58:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-03-18 00:58:06,049 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2022-03-18 00:58:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:06,049 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-03-18 00:58:06,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-03-18 00:58:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 00:58:06,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:06,050 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:06,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 00:58:06,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,SelfDestructingSolverStorable66,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:06,263 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2074955291, now seen corresponding path program 65 times [2022-03-18 00:58:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:06,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453287622] [2022-03-18 00:58:06,458 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 741322896, now seen corresponding path program 1 times [2022-03-18 00:58:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:06,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597986358] [2022-03-18 00:58:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:06,461 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:06,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2074955291, now seen corresponding path program 66 times [2022-03-18 00:58:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:06,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962519660] [2022-03-18 00:58:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:06,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962519660] [2022-03-18 00:58:06,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962519660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379827563] [2022-03-18 00:58:06,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:06,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:06,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:06,868 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) [2022-03-18 00:58:06,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:58:06,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:06,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:06,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:06,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-18 00:58:07,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-18 00:58:07,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379827563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:07,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:07,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-03-18 00:58:07,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:07,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453287622] [2022-03-18 00:58:07,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453287622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:07,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:07,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:58:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567664185] [2022-03-18 00:58:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:07,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:58:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:07,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:58:07,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:58:07,110 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:07,625 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-03-18 00:58:07,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:58:07,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-18 00:58:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:07,626 INFO L225 Difference]: With dead ends: 90 [2022-03-18 00:58:07,626 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 00:58:07,627 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2176, Invalid=3374, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:58:07,627 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:07,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 29 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 00:58:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-18 00:58:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-03-18 00:58:07,630 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2022-03-18 00:58:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:07,631 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-03-18 00:58:07,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-03-18 00:58:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 00:58:07,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:07,631 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:07,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-18 00:58:07,832 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,SelfDestructingSolverStorable67,SelfDestructingSolverStorable68 [2022-03-18 00:58:07,832 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1215373576, now seen corresponding path program 67 times [2022-03-18 00:58:07,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:07,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616382091] [2022-03-18 00:58:08,017 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash 800428240, now seen corresponding path program 1 times [2022-03-18 00:58:08,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:08,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940932986] [2022-03-18 00:58:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:08,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:08,021 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:08,023 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1215373576, now seen corresponding path program 68 times [2022-03-18 00:58:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066912933] [2022-03-18 00:58:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:08,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:08,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066912933] [2022-03-18 00:58:08,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066912933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:08,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141735320] [2022-03-18 00:58:08,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:08,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:08,442 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) [2022-03-18 00:58:08,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:58:08,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:58:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:08,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141735320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:09,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:09,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-18 00:58:09,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616382091] [2022-03-18 00:58:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616382091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:09,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:09,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:58:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026013127] [2022-03-18 00:58:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:09,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:58:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:58:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 00:58:09,726 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:10,272 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-03-18 00:58:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:58:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-18 00:58:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:10,273 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:58:10,273 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 00:58:10,274 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:58:10,274 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:10,274 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 19 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 00:58:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-18 00:58:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-03-18 00:58:10,278 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2022-03-18 00:58:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:10,278 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-03-18 00:58:10,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-03-18 00:58:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:58:10,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:10,278 INFO L500 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:10,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:10,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-18 00:58:10,479 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2125484907, now seen corresponding path program 69 times [2022-03-18 00:58:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:10,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87408831] [2022-03-18 00:58:10,627 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash 859533584, now seen corresponding path program 1 times [2022-03-18 00:58:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:10,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693969051] [2022-03-18 00:58:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:10,630 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:10,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:10,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2125484907, now seen corresponding path program 70 times [2022-03-18 00:58:10,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:10,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657177283] [2022-03-18 00:58:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:10,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:11,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:11,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657177283] [2022-03-18 00:58:11,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657177283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980823358] [2022-03-18 00:58:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:11,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:11,068 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) [2022-03-18 00:58:11,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:58:11,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:11,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 00:58:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:11,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:12,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980823358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:12,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-18 00:58:12,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:12,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87408831] [2022-03-18 00:58:12,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87408831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:12,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:58:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280698207] [2022-03-18 00:58:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:12,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:58:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:12,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:58:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:58:12,441 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:13,007 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-03-18 00:58:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:58:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-18 00:58:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:13,008 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:58:13,008 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:58:13,009 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:58:13,009 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:13,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:58:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-18 00:58:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-03-18 00:58:13,013 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2022-03-18 00:58:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:13,013 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-03-18 00:58:13,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-03-18 00:58:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 00:58:13,014 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:13,014 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:13,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-18 00:58:13,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,SelfDestructingSolverStorable72,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:13,223 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:13,224 INFO L85 PathProgramCache]: Analyzing trace with hash -569145614, now seen corresponding path program 71 times [2022-03-18 00:58:13,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45758509] [2022-03-18 00:58:13,415 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 918638928, now seen corresponding path program 1 times [2022-03-18 00:58:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:13,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857831579] [2022-03-18 00:58:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:13,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:13,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash -569145614, now seen corresponding path program 72 times [2022-03-18 00:58:13,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340400014] [2022-03-18 00:58:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:13,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340400014] [2022-03-18 00:58:13,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340400014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387683710] [2022-03-18 00:58:13,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:13,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:13,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:13,864 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) [2022-03-18 00:58:13,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 00:58:13,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:13,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-18 00:58:14,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-18 00:58:14,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387683710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:14,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:14,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-03-18 00:58:14,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45758509] [2022-03-18 00:58:14,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45758509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:14,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:14,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:58:14,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042350626] [2022-03-18 00:58:14,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:14,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:58:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:58:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:58:14,123 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:14,717 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-03-18 00:58:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:58:14,718 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-18 00:58:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:14,718 INFO L225 Difference]: With dead ends: 96 [2022-03-18 00:58:14,718 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 00:58:14,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2533, Invalid=3947, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:58:14,720 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:14,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 00:58:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-18 00:58:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-03-18 00:58:14,725 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2022-03-18 00:58:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:14,725 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-03-18 00:58:14,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-03-18 00:58:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 00:58:14,726 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:14,726 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:14,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-18 00:58:14,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,SelfDestructingSolverStorable74,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:14,931 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash 424295951, now seen corresponding path program 73 times [2022-03-18 00:58:14,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:14,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779442382] [2022-03-18 00:58:15,120 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 977744272, now seen corresponding path program 1 times [2022-03-18 00:58:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538330186] [2022-03-18 00:58:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:15,123 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:15,126 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash 424295951, now seen corresponding path program 74 times [2022-03-18 00:58:15,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:15,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701119147] [2022-03-18 00:58:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:15,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701119147] [2022-03-18 00:58:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701119147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:15,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854985248] [2022-03-18 00:58:15,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:15,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:15,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:15,632 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) [2022-03-18 00:58:15,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 00:58:15,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:15,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:58:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:15,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:17,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854985248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:17,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:17,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-18 00:58:17,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:17,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779442382] [2022-03-18 00:58:17,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779442382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:17,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:17,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:58:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118050762] [2022-03-18 00:58:17,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:17,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:58:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:58:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:58:17,083 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:17,717 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-03-18 00:58:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:58:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-18 00:58:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:17,717 INFO L225 Difference]: With dead ends: 98 [2022-03-18 00:58:17,717 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 00:58:17,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:58:17,719 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:17,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 00:58:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-18 00:58:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-03-18 00:58:17,722 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2022-03-18 00:58:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:17,723 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-03-18 00:58:17,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-03-18 00:58:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:58:17,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:17,725 INFO L500 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:17,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:17,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,SelfDestructingSolverStorable76,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:17,941 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1638900204, now seen corresponding path program 75 times [2022-03-18 00:58:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:17,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264002765] [2022-03-18 00:58:18,127 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849616, now seen corresponding path program 1 times [2022-03-18 00:58:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910332969] [2022-03-18 00:58:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:18,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:18,130 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:18,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1638900204, now seen corresponding path program 76 times [2022-03-18 00:58:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376358286] [2022-03-18 00:58:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:18,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:18,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:18,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:18,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376358286] [2022-03-18 00:58:18,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376358286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:18,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654352991] [2022-03-18 00:58:18,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:18,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:18,602 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) [2022-03-18 00:58:18,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 00:58:18,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 00:58:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:18,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654352991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:20,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:20,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-18 00:58:20,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264002765] [2022-03-18 00:58:20,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264002765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:20,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:20,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:58:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42751069] [2022-03-18 00:58:20,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:20,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:58:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:58:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:58:20,136 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:20,805 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-18 00:58:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:58:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-18 00:58:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:20,806 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:58:20,806 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 00:58:20,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:58:20,808 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:20,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 00:58:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-18 00:58:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-18 00:58:20,811 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 89 [2022-03-18 00:58:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:20,812 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-18 00:58:20,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-18 00:58:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 00:58:20,812 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:20,812 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:20,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:21,027 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,SelfDestructingSolverStorable77,SelfDestructingSolverStorable78 [2022-03-18 00:58:21,027 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash 642482825, now seen corresponding path program 77 times [2022-03-18 00:58:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858055844] [2022-03-18 00:58:21,220 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1095954960, now seen corresponding path program 1 times [2022-03-18 00:58:21,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:21,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508976923] [2022-03-18 00:58:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:21,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:21,224 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:21,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash 642482825, now seen corresponding path program 78 times [2022-03-18 00:58:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:21,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090560344] [2022-03-18 00:58:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:21,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:21,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090560344] [2022-03-18 00:58:21,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090560344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598018467] [2022-03-18 00:58:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:21,760 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) [2022-03-18 00:58:21,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 00:58:21,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:21,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:21,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-18 00:58:21,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-18 00:58:22,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598018467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:22,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:22,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-03-18 00:58:22,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:22,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858055844] [2022-03-18 00:58:22,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858055844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:22,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:22,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:58:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109420359] [2022-03-18 00:58:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:22,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:58:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:22,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:58:22,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:58:22,033 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:22,740 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2022-03-18 00:58:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:58:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-18 00:58:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:22,741 INFO L225 Difference]: With dead ends: 102 [2022-03-18 00:58:22,741 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 00:58:22,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2917, Invalid=4565, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:58:22,743 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:22,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 49 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 00:58:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-18 00:58:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-18 00:58:22,747 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2022-03-18 00:58:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:22,747 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-18 00:58:22,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-18 00:58:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 00:58:22,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:22,747 INFO L500 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:22,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-18 00:58:22,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-18 00:58:22,959 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash 863088614, now seen corresponding path program 79 times [2022-03-18 00:58:22,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349050565] [2022-03-18 00:58:23,128 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1155060304, now seen corresponding path program 1 times [2022-03-18 00:58:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:23,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051590754] [2022-03-18 00:58:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:23,132 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:23,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash 863088614, now seen corresponding path program 80 times [2022-03-18 00:58:23,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295389834] [2022-03-18 00:58:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:23,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:23,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295389834] [2022-03-18 00:58:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295389834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140922804] [2022-03-18 00:58:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:23,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:23,682 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) [2022-03-18 00:58:23,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 00:58:23,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:23,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:23,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:58:23,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:23,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:25,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140922804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:25,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-18 00:58:25,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349050565] [2022-03-18 00:58:25,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349050565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:25,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:58:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471822859] [2022-03-18 00:58:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:25,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:58:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:58:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:58:25,355 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:26,116 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-03-18 00:58:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:58:26,116 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-18 00:58:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:26,116 INFO L225 Difference]: With dead ends: 104 [2022-03-18 00:58:26,117 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 00:58:26,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:58:26,118 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:26,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 00:58:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-18 00:58:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-18 00:58:26,121 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2022-03-18 00:58:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:26,122 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-18 00:58:26,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-18 00:58:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:58:26,122 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:26,122 INFO L500 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:26,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-18 00:58:26,331 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,SelfDestructingSolverStorable81,SelfDestructingSolverStorable82 [2022-03-18 00:58:26,331 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1883112957, now seen corresponding path program 81 times [2022-03-18 00:58:26,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [249785506] [2022-03-18 00:58:26,509 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:26,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1214165648, now seen corresponding path program 1 times [2022-03-18 00:58:26,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:26,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428485612] [2022-03-18 00:58:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:26,512 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:26,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1883112957, now seen corresponding path program 82 times [2022-03-18 00:58:26,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:26,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676531836] [2022-03-18 00:58:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:26,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:27,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:27,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:27,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676531836] [2022-03-18 00:58:27,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676531836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:27,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052098132] [2022-03-18 00:58:27,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:27,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:27,071 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) [2022-03-18 00:58:27,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 00:58:27,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:27,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 00:58:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:27,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:28,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052098132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:28,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:28,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-18 00:58:28,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [249785506] [2022-03-18 00:58:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [249785506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:28,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:28,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:58:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135930252] [2022-03-18 00:58:28,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:28,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:58:28,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:58:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:58:28,818 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:29,550 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-03-18 00:58:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:58:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-18 00:58:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:29,551 INFO L225 Difference]: With dead ends: 106 [2022-03-18 00:58:29,551 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 00:58:29,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:58:29,552 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:29,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 00:58:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-18 00:58:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-03-18 00:58:29,556 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 95 [2022-03-18 00:58:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:29,556 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-03-18 00:58:29,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-03-18 00:58:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 00:58:29,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:29,557 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:29,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:29,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,SelfDestructingSolverStorable84,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:29,771 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:29,772 INFO L85 PathProgramCache]: Analyzing trace with hash 422064352, now seen corresponding path program 83 times [2022-03-18 00:58:29,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:29,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1565966435] [2022-03-18 00:58:29,961 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1273270992, now seen corresponding path program 1 times [2022-03-18 00:58:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:29,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97463180] [2022-03-18 00:58:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:29,972 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:29,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash 422064352, now seen corresponding path program 84 times [2022-03-18 00:58:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:29,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094285578] [2022-03-18 00:58:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:30,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094285578] [2022-03-18 00:58:30,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094285578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499431448] [2022-03-18 00:58:30,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:30,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:30,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:30,554 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) [2022-03-18 00:58:30,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 00:58:30,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:30,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-18 00:58:30,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-18 00:58:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499431448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:30,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:30,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 50 [2022-03-18 00:58:30,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1565966435] [2022-03-18 00:58:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1565966435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:30,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:58:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995394657] [2022-03-18 00:58:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:30,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:58:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:58:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:58:30,843 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:31,618 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-03-18 00:58:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 00:58:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-18 00:58:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:31,619 INFO L225 Difference]: With dead ends: 108 [2022-03-18 00:58:31,619 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 00:58:31,620 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:58:31,620 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:31,620 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 00:58:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-18 00:58:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-03-18 00:58:31,624 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2022-03-18 00:58:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:31,624 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-03-18 00:58:31,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-03-18 00:58:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 00:58:31,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:31,625 INFO L500 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:31,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:31,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,SelfDestructingSolverStorable86,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:31,842 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:31,842 INFO L85 PathProgramCache]: Analyzing trace with hash -505666435, now seen corresponding path program 85 times [2022-03-18 00:58:31,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983086773] [2022-03-18 00:58:32,001 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1332376336, now seen corresponding path program 1 times [2022-03-18 00:58:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:32,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497974774] [2022-03-18 00:58:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:32,007 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:32,009 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash -505666435, now seen corresponding path program 86 times [2022-03-18 00:58:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:32,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092632846] [2022-03-18 00:58:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:32,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092632846] [2022-03-18 00:58:32,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092632846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:32,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492514191] [2022-03-18 00:58:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:32,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:32,606 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) [2022-03-18 00:58:32,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 00:58:32,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:32,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:58:32,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:32,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:34,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492514191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:34,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:34,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-18 00:58:34,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983086773] [2022-03-18 00:58:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983086773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:34,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:34,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:58:34,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662125730] [2022-03-18 00:58:34,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:34,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:58:34,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:58:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:58:34,511 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:35,368 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-03-18 00:58:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:58:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-18 00:58:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:35,369 INFO L225 Difference]: With dead ends: 110 [2022-03-18 00:58:35,369 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 00:58:35,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 00:58:35,370 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:35,371 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 24 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 00:58:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 00:58:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-03-18 00:58:35,375 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 99 [2022-03-18 00:58:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:35,375 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-03-18 00:58:35,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-03-18 00:58:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 00:58:35,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:35,375 INFO L500 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:35,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:35,587 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,SelfDestructingSolverStorable87,SelfDestructingSolverStorable88 [2022-03-18 00:58:35,587 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:35,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1298244826, now seen corresponding path program 87 times [2022-03-18 00:58:35,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:35,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518203606] [2022-03-18 00:58:35,790 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1391481680, now seen corresponding path program 1 times [2022-03-18 00:58:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:35,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963384470] [2022-03-18 00:58:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:35,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:35,794 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:35,796 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1298244826, now seen corresponding path program 88 times [2022-03-18 00:58:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:35,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447461107] [2022-03-18 00:58:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:36,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:36,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447461107] [2022-03-18 00:58:36,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447461107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848253717] [2022-03-18 00:58:36,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:36,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:36,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:36,444 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) [2022-03-18 00:58:36,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 00:58:36,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 00:58:36,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:36,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848253717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:38,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-18 00:58:38,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518203606] [2022-03-18 00:58:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518203606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:38,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 00:58:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905372721] [2022-03-18 00:58:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:38,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 00:58:38,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:38,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 00:58:38,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:58:38,444 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:39,317 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-03-18 00:58:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 00:58:39,317 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-18 00:58:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:39,318 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:58:39,318 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 00:58:39,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 00:58:39,319 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:39,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 34 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 00:58:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-18 00:58:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-03-18 00:58:39,323 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 101 [2022-03-18 00:58:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:39,323 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-03-18 00:58:39,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-03-18 00:58:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 00:58:39,324 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:39,324 INFO L500 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:39,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:39,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 00:58:39,539 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash -309820937, now seen corresponding path program 89 times [2022-03-18 00:58:39,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:39,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393725645] [2022-03-18 00:58:39,731 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1450587024, now seen corresponding path program 1 times [2022-03-18 00:58:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:39,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465316371] [2022-03-18 00:58:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:39,734 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:39,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -309820937, now seen corresponding path program 90 times [2022-03-18 00:58:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:39,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199372798] [2022-03-18 00:58:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:40,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:40,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199372798] [2022-03-18 00:58:40,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199372798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362393490] [2022-03-18 00:58:40,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:40,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:40,383 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) [2022-03-18 00:58:40,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 00:58:40,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:40,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-18 00:58:40,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-18 00:58:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362393490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:40,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:40,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-03-18 00:58:40,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393725645] [2022-03-18 00:58:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393725645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:40,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:40,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:58:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458513977] [2022-03-18 00:58:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:40,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:58:40,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:58:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:58:40,710 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:41,570 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-03-18 00:58:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:58:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-18 00:58:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:41,571 INFO L225 Difference]: With dead ends: 114 [2022-03-18 00:58:41,571 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 00:58:41,573 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:58:41,573 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:41,573 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 00:58:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-18 00:58:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2022-03-18 00:58:41,577 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 103 [2022-03-18 00:58:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:41,577 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2022-03-18 00:58:41,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2022-03-18 00:58:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 00:58:41,578 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:41,578 INFO L500 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:41,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 00:58:41,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,SelfDestructingSolverStorable92,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:41,783 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 527207380, now seen corresponding path program 91 times [2022-03-18 00:58:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:41,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1883154387] [2022-03-18 00:58:41,922 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:41,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1509692368, now seen corresponding path program 1 times [2022-03-18 00:58:41,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:41,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871295861] [2022-03-18 00:58:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:41,925 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:41,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash 527207380, now seen corresponding path program 92 times [2022-03-18 00:58:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:41,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56036421] [2022-03-18 00:58:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:42,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56036421] [2022-03-18 00:58:42,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56036421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143461641] [2022-03-18 00:58:42,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:42,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:42,611 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) [2022-03-18 00:58:42,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 00:58:42,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:42,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 00:58:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:42,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143461641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:44,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:44,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-18 00:58:44,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1883154387] [2022-03-18 00:58:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1883154387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:44,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:44,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 00:58:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071407787] [2022-03-18 00:58:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:44,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 00:58:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 00:58:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 00:58:44,711 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:45,615 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-03-18 00:58:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 00:58:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-18 00:58:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:45,616 INFO L225 Difference]: With dead ends: 116 [2022-03-18 00:58:45,616 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 00:58:45,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:58:45,617 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:45,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 00:58:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-18 00:58:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-03-18 00:58:45,621 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 105 [2022-03-18 00:58:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:45,622 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-03-18 00:58:45,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-03-18 00:58:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 00:58:45,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:45,622 INFO L500 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:45,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:45,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,SelfDestructingSolverStorable94,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:45,823 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1752535665, now seen corresponding path program 93 times [2022-03-18 00:58:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:45,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [36057715] [2022-03-18 00:58:46,020 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1568797712, now seen corresponding path program 1 times [2022-03-18 00:58:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102332267] [2022-03-18 00:58:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:46,023 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:46,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:46,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1752535665, now seen corresponding path program 94 times [2022-03-18 00:58:46,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:46,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060695190] [2022-03-18 00:58:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:46,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:46,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:46,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060695190] [2022-03-18 00:58:46,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060695190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:46,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855385170] [2022-03-18 00:58:46,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:46,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:46,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:46,729 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) [2022-03-18 00:58:46,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 00:58:46,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:46,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 00:58:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:46,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:48,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855385170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:48,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:48,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-18 00:58:48,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:48,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [36057715] [2022-03-18 00:58:48,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [36057715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:48,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:48,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:58:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932867947] [2022-03-18 00:58:48,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:48,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:58:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:58:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:58:48,896 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:49,808 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-03-18 00:58:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:58:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-18 00:58:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:49,809 INFO L225 Difference]: With dead ends: 118 [2022-03-18 00:58:49,809 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 00:58:49,810 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 00:58:49,810 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:49,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 29 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 00:58:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-18 00:58:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-03-18 00:58:49,814 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2022-03-18 00:58:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:49,814 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-03-18 00:58:49,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-03-18 00:58:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 00:58:49,815 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:49,815 INFO L500 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:49,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:50,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,SelfDestructingSolverStorable96,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:50,031 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1822988850, now seen corresponding path program 95 times [2022-03-18 00:58:50,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:50,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752605127] [2022-03-18 00:58:50,178 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1627903056, now seen corresponding path program 1 times [2022-03-18 00:58:50,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:50,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790037776] [2022-03-18 00:58:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:50,181 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:50,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:50,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1822988850, now seen corresponding path program 96 times [2022-03-18 00:58:50,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:50,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256460152] [2022-03-18 00:58:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:50,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:50,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256460152] [2022-03-18 00:58:50,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256460152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:50,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277598488] [2022-03-18 00:58:50,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:58:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:50,943 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) [2022-03-18 00:58:50,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 00:58:50,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:58:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:50,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:58:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-18 00:58:51,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-18 00:58:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277598488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:51,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:51,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 56 [2022-03-18 00:58:51,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752605127] [2022-03-18 00:58:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752605127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:51,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:51,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 00:58:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856555111] [2022-03-18 00:58:51,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:51,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 00:58:51,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:51,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 00:58:51,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:58:51,262 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:52,221 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-03-18 00:58:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 00:58:52,221 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-18 00:58:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:52,222 INFO L225 Difference]: With dead ends: 120 [2022-03-18 00:58:52,222 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 00:58:52,222 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4231, Invalid=6689, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 00:58:52,222 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:52,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 00:58:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-18 00:58:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-03-18 00:58:52,226 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 109 [2022-03-18 00:58:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:52,227 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-03-18 00:58:52,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-03-18 00:58:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 00:58:52,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:52,228 INFO L500 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:52,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:52,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-18 00:58:52,447 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1928210965, now seen corresponding path program 97 times [2022-03-18 00:58:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:52,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871636065] [2022-03-18 00:58:52,644 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1687008400, now seen corresponding path program 1 times [2022-03-18 00:58:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:52,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074860048] [2022-03-18 00:58:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:52,647 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:52,649 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1928210965, now seen corresponding path program 98 times [2022-03-18 00:58:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:52,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413286126] [2022-03-18 00:58:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:53,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413286126] [2022-03-18 00:58:53,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413286126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:53,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254828082] [2022-03-18 00:58:53,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:58:53,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:53,402 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) [2022-03-18 00:58:53,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 00:58:53,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:58:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:58:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:53,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:58:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254828082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:58:55,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:58:55,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-18 00:58:55,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:58:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871636065] [2022-03-18 00:58:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871636065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:58:55,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:58:55,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:58:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829594310] [2022-03-18 00:58:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:58:55,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:58:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:58:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:58:55,754 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:58:56,761 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-03-18 00:58:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:58:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-03-18 00:58:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:58:56,762 INFO L225 Difference]: With dead ends: 122 [2022-03-18 00:58:56,762 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 00:58:56,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 00:58:56,764 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:58:56,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:58:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 00:58:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-18 00:58:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-03-18 00:58:56,768 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2022-03-18 00:58:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:58:56,768 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-03-18 00:58:56,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:58:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-03-18 00:58:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:58:56,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:58:56,769 INFO L500 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:58:56,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 00:58:56,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99,SelfDestructingSolverStorable100 [2022-03-18 00:58:56,983 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:58:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:58:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 32551624, now seen corresponding path program 99 times [2022-03-18 00:58:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:58:56,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985518722] [2022-03-18 00:58:57,189 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:58:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1746113744, now seen corresponding path program 1 times [2022-03-18 00:58:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:57,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203925734] [2022-03-18 00:58:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:57,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:57,192 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:58:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:58:57,194 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:58:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash 32551624, now seen corresponding path program 100 times [2022-03-18 00:58:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:58:57,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925378923] [2022-03-18 00:58:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:58:57,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:58:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:57,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:58:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:58:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:58:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925378923] [2022-03-18 00:58:57,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925378923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:58:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443074232] [2022-03-18 00:58:57,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:58:57,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:58:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:58:57,966 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) [2022-03-18 00:58:57,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 00:58:58,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:58:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:58:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 00:58:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:58:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:58:58,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443074232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:00,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:00,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-18 00:59:00,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985518722] [2022-03-18 00:59:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985518722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:00,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:00,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 00:59:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124440210] [2022-03-18 00:59:00,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:00,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 00:59:00,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:00,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 00:59:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:59:00,387 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:01,399 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-18 00:59:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 00:59:01,399 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-18 00:59:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:01,400 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:59:01,400 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 00:59:01,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 00:59:01,401 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:01,401 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 59 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 00:59:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-18 00:59:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-03-18 00:59:01,405 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 113 [2022-03-18 00:59:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:01,405 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-03-18 00:59:01,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-03-18 00:59:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 00:59:01,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:01,406 INFO L500 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:01,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:01,616 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,SelfDestructingSolverStorable101,SelfDestructingSolverStorable102 [2022-03-18 00:59:01,616 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243291, now seen corresponding path program 101 times [2022-03-18 00:59:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1146483244] [2022-03-18 00:59:01,819 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1805219088, now seen corresponding path program 1 times [2022-03-18 00:59:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:01,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385019782] [2022-03-18 00:59:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:01,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:01,821 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:01,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243291, now seen corresponding path program 102 times [2022-03-18 00:59:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:01,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899731201] [2022-03-18 00:59:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:02,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:02,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:02,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899731201] [2022-03-18 00:59:02,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899731201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:02,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21106889] [2022-03-18 00:59:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:02,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:02,666 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) [2022-03-18 00:59:02,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 00:59:02,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:59:02,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:59:02,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:59:03,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21106889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:03,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:03,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 4, 4] total 59 [2022-03-18 00:59:03,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1146483244] [2022-03-18 00:59:03,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1146483244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:03,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:03,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:59:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8058370] [2022-03-18 00:59:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:03,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:59:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:59:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:59:03,003 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:04,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:04,022 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-03-18 00:59:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:59:04,023 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-18 00:59:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:04,023 INFO L225 Difference]: With dead ends: 126 [2022-03-18 00:59:04,023 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 00:59:04,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4723, Invalid=7487, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 00:59:04,024 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:04,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 00:59:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-18 00:59:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-03-18 00:59:04,028 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 115 [2022-03-18 00:59:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:04,028 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-03-18 00:59:04,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-03-18 00:59:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 00:59:04,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:04,029 INFO L500 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:04,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-18 00:59:04,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-18 00:59:04,230 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:04,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1194921278, now seen corresponding path program 103 times [2022-03-18 00:59:04,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:04,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026990217] [2022-03-18 00:59:04,389 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1864324432, now seen corresponding path program 1 times [2022-03-18 00:59:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114656541] [2022-03-18 00:59:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:04,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:04,392 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:04,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1194921278, now seen corresponding path program 104 times [2022-03-18 00:59:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:04,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603167894] [2022-03-18 00:59:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:04,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:05,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:05,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603167894] [2022-03-18 00:59:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603167894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161271721] [2022-03-18 00:59:05,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:05,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:05,230 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) [2022-03-18 00:59:05,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 00:59:05,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:05,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 00:59:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:05,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:07,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161271721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:07,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:07,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-18 00:59:07,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026990217] [2022-03-18 00:59:07,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026990217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:07,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:07,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:59:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500699555] [2022-03-18 00:59:07,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:07,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:59:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:59:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 00:59:07,842 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:08,961 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-03-18 00:59:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:59:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-03-18 00:59:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:08,962 INFO L225 Difference]: With dead ends: 128 [2022-03-18 00:59:08,962 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 00:59:08,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:59:08,964 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:08,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 24 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 00:59:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-18 00:59:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-03-18 00:59:08,968 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2022-03-18 00:59:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:08,968 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-03-18 00:59:08,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-03-18 00:59:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 00:59:08,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:08,969 INFO L500 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:08,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:09,183 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,SelfDestructingSolverStorable105,SelfDestructingSolverStorable106 [2022-03-18 00:59:09,183 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 349304287, now seen corresponding path program 105 times [2022-03-18 00:59:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1146289928] [2022-03-18 00:59:09,415 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:09,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1923429776, now seen corresponding path program 1 times [2022-03-18 00:59:09,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:09,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383202380] [2022-03-18 00:59:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:09,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:09,418 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:09,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 349304287, now seen corresponding path program 106 times [2022-03-18 00:59:09,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008672088] [2022-03-18 00:59:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:09,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:10,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:10,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008672088] [2022-03-18 00:59:10,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008672088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981415624] [2022-03-18 00:59:10,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:10,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:10,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:10,312 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) [2022-03-18 00:59:10,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 00:59:10,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:10,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 00:59:10,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:13,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981415624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:13,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:13,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-18 00:59:13,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:13,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1146289928] [2022-03-18 00:59:13,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1146289928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:13,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:13,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:59:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990674829] [2022-03-18 00:59:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:13,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:59:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:59:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:59:13,095 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:14,237 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-03-18 00:59:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:59:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-18 00:59:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:14,238 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:59:14,238 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 00:59:14,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-03-18 00:59:14,240 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:14,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 00:59:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-18 00:59:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-03-18 00:59:14,244 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 119 [2022-03-18 00:59:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:14,244 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-03-18 00:59:14,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-03-18 00:59:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 00:59:14,245 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:14,245 INFO L500 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:14,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:14,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-18 00:59:14,451 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1708612164, now seen corresponding path program 107 times [2022-03-18 00:59:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:14,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1193296466] [2022-03-18 00:59:14,673 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:14,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1982535120, now seen corresponding path program 1 times [2022-03-18 00:59:14,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:14,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939019005] [2022-03-18 00:59:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:14,676 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:14,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1708612164, now seen corresponding path program 108 times [2022-03-18 00:59:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:14,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305134230] [2022-03-18 00:59:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:15,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:15,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:15,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305134230] [2022-03-18 00:59:15,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305134230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147048372] [2022-03-18 00:59:15,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:15,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:15,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:15,578 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) [2022-03-18 00:59:15,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 00:59:15,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:59:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-18 00:59:15,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-18 00:59:15,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147048372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:15,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:15,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 4, 4] total 62 [2022-03-18 00:59:15,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:15,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1193296466] [2022-03-18 00:59:15,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1193296466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:15,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:15,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 00:59:15,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219752110] [2022-03-18 00:59:15,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:15,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 00:59:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 00:59:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:59:15,942 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:17,111 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-03-18 00:59:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 00:59:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-03-18 00:59:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:17,112 INFO L225 Difference]: With dead ends: 132 [2022-03-18 00:59:17,112 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 00:59:17,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5242, Invalid=8330, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 00:59:17,113 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:17,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 24 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 00:59:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-18 00:59:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-03-18 00:59:17,119 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 121 [2022-03-18 00:59:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:17,119 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-03-18 00:59:17,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-03-18 00:59:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 00:59:17,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:17,120 INFO L500 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:17,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-18 00:59:17,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,SelfDestructingSolverStorable109,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:17,337 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:17,337 INFO L85 PathProgramCache]: Analyzing trace with hash 613601881, now seen corresponding path program 109 times [2022-03-18 00:59:17,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:17,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193862343] [2022-03-18 00:59:17,492 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2041640464, now seen corresponding path program 1 times [2022-03-18 00:59:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109545373] [2022-03-18 00:59:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:17,495 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:17,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 613601881, now seen corresponding path program 110 times [2022-03-18 00:59:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003292427] [2022-03-18 00:59:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:18,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:18,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:18,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003292427] [2022-03-18 00:59:18,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003292427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:18,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20050949] [2022-03-18 00:59:18,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:18,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:18,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:18,424 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) [2022-03-18 00:59:18,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 00:59:18,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:18,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 00:59:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:18,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20050949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:21,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:21,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-18 00:59:21,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193862343] [2022-03-18 00:59:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193862343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:21,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:21,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 00:59:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405593441] [2022-03-18 00:59:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:21,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 00:59:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 00:59:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 00:59:21,358 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:22,592 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-03-18 00:59:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 00:59:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-18 00:59:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:22,593 INFO L225 Difference]: With dead ends: 134 [2022-03-18 00:59:22,593 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 00:59:22,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 00:59:22,594 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:22,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 00:59:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-18 00:59:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-03-18 00:59:22,599 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 123 [2022-03-18 00:59:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:22,599 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-03-18 00:59:22,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-03-18 00:59:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 00:59:22,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:22,600 INFO L500 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:22,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-18 00:59:22,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,SelfDestructingSolverStorable112,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:22,817 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1121694794, now seen corresponding path program 111 times [2022-03-18 00:59:22,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:22,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307569718] [2022-03-18 00:59:23,021 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2100745808, now seen corresponding path program 1 times [2022-03-18 00:59:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:23,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125197217] [2022-03-18 00:59:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:23,024 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:23,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1121694794, now seen corresponding path program 112 times [2022-03-18 00:59:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894827727] [2022-03-18 00:59:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:24,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894827727] [2022-03-18 00:59:24,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894827727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:24,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026770674] [2022-03-18 00:59:24,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:24,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:24,021 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) [2022-03-18 00:59:24,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 00:59:24,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-18 00:59:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:24,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026770674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:27,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:27,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-18 00:59:27,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:27,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307569718] [2022-03-18 00:59:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307569718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 00:59:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324446636] [2022-03-18 00:59:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:27,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 00:59:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 00:59:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:59:27,089 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:28,353 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-03-18 00:59:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 00:59:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-18 00:59:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:28,354 INFO L225 Difference]: With dead ends: 136 [2022-03-18 00:59:28,354 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 00:59:28,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 00:59:28,355 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:28,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 00:59:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-18 00:59:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-18 00:59:28,360 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 125 [2022-03-18 00:59:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:28,360 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-18 00:59:28,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-18 00:59:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 00:59:28,360 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:28,361 INFO L500 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:28,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:28,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113,SelfDestructingSolverStorable114 [2022-03-18 00:59:28,567 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2000478675, now seen corresponding path program 113 times [2022-03-18 00:59:28,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77427374] [2022-03-18 00:59:28,729 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2135116144, now seen corresponding path program 1 times [2022-03-18 00:59:28,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:28,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554047891] [2022-03-18 00:59:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:28,732 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:28,734 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2000478675, now seen corresponding path program 114 times [2022-03-18 00:59:28,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:28,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654069148] [2022-03-18 00:59:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:29,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:29,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654069148] [2022-03-18 00:59:29,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654069148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107174038] [2022-03-18 00:59:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:29,758 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) [2022-03-18 00:59:29,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 00:59:29,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:29,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:59:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-18 00:59:29,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-18 00:59:30,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107174038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:30,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:30,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 4, 4] total 65 [2022-03-18 00:59:30,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [77427374] [2022-03-18 00:59:30,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [77427374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:30,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:30,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 00:59:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131006318] [2022-03-18 00:59:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:30,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 00:59:30,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 00:59:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:59:30,130 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:31,426 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-03-18 00:59:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 00:59:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-03-18 00:59:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:31,428 INFO L225 Difference]: With dead ends: 138 [2022-03-18 00:59:31,428 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 00:59:31,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5788, Invalid=9218, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 00:59:31,429 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:31,429 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 00:59:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-18 00:59:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-03-18 00:59:31,433 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2022-03-18 00:59:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:31,433 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-03-18 00:59:31,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-03-18 00:59:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 00:59:31,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:31,434 INFO L500 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:31,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-18 00:59:31,641 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,SelfDestructingSolverStorable115,SelfDestructingSolverStorable116 [2022-03-18 00:59:31,641 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:31,642 INFO L85 PathProgramCache]: Analyzing trace with hash 227042480, now seen corresponding path program 115 times [2022-03-18 00:59:31,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:31,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [963912443] [2022-03-18 00:59:31,869 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:31,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2076010800, now seen corresponding path program 1 times [2022-03-18 00:59:31,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:31,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450649512] [2022-03-18 00:59:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:31,872 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:31,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash 227042480, now seen corresponding path program 116 times [2022-03-18 00:59:31,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:31,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010604089] [2022-03-18 00:59:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:32,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:32,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:32,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010604089] [2022-03-18 00:59:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010604089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100925324] [2022-03-18 00:59:32,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:32,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:32,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:32,995 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) [2022-03-18 00:59:32,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 00:59:33,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:33,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 00:59:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100925324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:36,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:36,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-18 00:59:36,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [963912443] [2022-03-18 00:59:36,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [963912443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:36,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:36,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 00:59:36,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087494095] [2022-03-18 00:59:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:36,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 00:59:36,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 00:59:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 00:59:36,258 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:37,589 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-03-18 00:59:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 00:59:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-03-18 00:59:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:37,590 INFO L225 Difference]: With dead ends: 140 [2022-03-18 00:59:37,590 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 00:59:37,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 00:59:37,591 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:37,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 39 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 00:59:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-18 00:59:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-03-18 00:59:37,596 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 129 [2022-03-18 00:59:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:37,596 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-03-18 00:59:37,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-03-18 00:59:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 00:59:37,597 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:37,597 INFO L500 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:37,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:37,797 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,SelfDestructingSolverStorable117,SelfDestructingSolverStorable118 [2022-03-18 00:59:37,797 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1056875597, now seen corresponding path program 117 times [2022-03-18 00:59:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:37,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [964066623] [2022-03-18 00:59:37,996 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:37,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2016905456, now seen corresponding path program 1 times [2022-03-18 00:59:37,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:37,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548219713] [2022-03-18 00:59:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:37,999 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:38,000 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1056875597, now seen corresponding path program 118 times [2022-03-18 00:59:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:38,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614908019] [2022-03-18 00:59:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:39,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:39,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614908019] [2022-03-18 00:59:39,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614908019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663158301] [2022-03-18 00:59:39,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:39,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:39,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:39,052 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) [2022-03-18 00:59:39,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 00:59:39,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:39,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 00:59:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:39,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:42,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663158301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:42,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:42,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-18 00:59:42,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:42,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [964066623] [2022-03-18 00:59:42,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [964066623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:42,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:42,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 00:59:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297710516] [2022-03-18 00:59:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:42,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 00:59:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 00:59:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:59:42,354 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:43,701 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-03-18 00:59:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 00:59:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-18 00:59:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:43,702 INFO L225 Difference]: With dead ends: 142 [2022-03-18 00:59:43,702 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 00:59:43,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-03-18 00:59:43,704 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:43,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 39 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 00:59:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-18 00:59:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-03-18 00:59:43,708 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 131 [2022-03-18 00:59:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:43,708 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-03-18 00:59:43,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-03-18 00:59:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 00:59:43,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:43,709 INFO L500 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:43,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-18 00:59:43,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-18 00:59:43,909 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -337416022, now seen corresponding path program 119 times [2022-03-18 00:59:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700099490] [2022-03-18 00:59:44,065 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1957800112, now seen corresponding path program 1 times [2022-03-18 00:59:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:44,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079747046] [2022-03-18 00:59:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:44,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:44,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:44,069 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash -337416022, now seen corresponding path program 120 times [2022-03-18 00:59:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:44,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179739027] [2022-03-18 00:59:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:45,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:45,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179739027] [2022-03-18 00:59:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179739027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361045294] [2022-03-18 00:59:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:59:45,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:45,146 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) [2022-03-18 00:59:45,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 00:59:45,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:59:45,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:59:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-18 00:59:45,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-18 00:59:45,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361045294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:45,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:45,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 4, 4] total 68 [2022-03-18 00:59:45,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:45,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700099490] [2022-03-18 00:59:45,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700099490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:45,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:45,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 00:59:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372693934] [2022-03-18 00:59:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:45,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 00:59:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 00:59:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:59:45,544 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:46,935 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2022-03-18 00:59:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 00:59:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-18 00:59:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:46,936 INFO L225 Difference]: With dead ends: 144 [2022-03-18 00:59:46,936 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 00:59:46,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6361, Invalid=10151, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 00:59:46,937 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:46,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 39 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 00:59:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-18 00:59:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-03-18 00:59:46,941 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 133 [2022-03-18 00:59:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:46,942 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-03-18 00:59:46,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-03-18 00:59:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 00:59:46,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:46,942 INFO L500 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:46,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-18 00:59:47,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,SelfDestructingSolverStorable122,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:47,147 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:47,147 INFO L85 PathProgramCache]: Analyzing trace with hash -221865529, now seen corresponding path program 121 times [2022-03-18 00:59:47,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:47,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581028468] [2022-03-18 00:59:47,303 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1898694768, now seen corresponding path program 1 times [2022-03-18 00:59:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:47,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963107482] [2022-03-18 00:59:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:47,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:47,306 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:47,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -221865529, now seen corresponding path program 122 times [2022-03-18 00:59:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:47,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643171022] [2022-03-18 00:59:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643171022] [2022-03-18 00:59:48,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643171022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885472792] [2022-03-18 00:59:48,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:59:48,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:48,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:48,460 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) [2022-03-18 00:59:48,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 00:59:48,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:59:48,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 00:59:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:48,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:51,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885472792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:51,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:51,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-18 00:59:51,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:51,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581028468] [2022-03-18 00:59:51,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581028468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:51,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:51,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 00:59:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60746882] [2022-03-18 00:59:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:51,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 00:59:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 00:59:51,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 00:59:51,946 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:53,439 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-03-18 00:59:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 00:59:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-18 00:59:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:53,440 INFO L225 Difference]: With dead ends: 146 [2022-03-18 00:59:53,440 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 00:59:53,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 00:59:53,442 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:53,442 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 49 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 00:59:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-18 00:59:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-03-18 00:59:53,450 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 135 [2022-03-18 00:59:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:53,450 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-03-18 00:59:53,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-03-18 00:59:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 00:59:53,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:53,451 INFO L500 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:53,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 00:59:53,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123,SelfDestructingSolverStorable124 [2022-03-18 00:59:53,655 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -846991452, now seen corresponding path program 123 times [2022-03-18 00:59:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878767846] [2022-03-18 00:59:53,831 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:59:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589424, now seen corresponding path program 1 times [2022-03-18 00:59:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831944955] [2022-03-18 00:59:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:53,834 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:59:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:59:53,836 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:59:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -846991452, now seen corresponding path program 124 times [2022-03-18 00:59:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882250019] [2022-03-18 00:59:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:55,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882250019] [2022-03-18 00:59:55,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882250019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:59:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731896532] [2022-03-18 00:59:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:59:55,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:59:55,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:55,027 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) [2022-03-18 00:59:55,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 00:59:55,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:59:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:59:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 00:59:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:59:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:55,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:59:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731896532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:59:58,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:59:58,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-18 00:59:58,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:58,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878767846] [2022-03-18 00:59:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878767846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:58,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:58,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 00:59:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022267696] [2022-03-18 00:59:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:58,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 00:59:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 00:59:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:59:58,730 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:00,269 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-03-18 01:00:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 01:00:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-18 01:00:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:00,270 INFO L225 Difference]: With dead ends: 148 [2022-03-18 01:00:00,270 INFO L226 Difference]: Without dead ends: 141 [2022-03-18 01:00:00,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-03-18 01:00:00,272 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:00,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:00:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-18 01:00:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-18 01:00:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-03-18 01:00:00,277 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2022-03-18 01:00:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:00,277 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-03-18 01:00:00,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-03-18 01:00:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 01:00:00,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:00,277 INFO L500 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:00,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-18 01:00:00,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126,SelfDestructingSolverStorable125 [2022-03-18 01:00:00,478 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash -297582015, now seen corresponding path program 125 times [2022-03-18 01:00:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:00,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [674941931] [2022-03-18 01:00:00,711 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1780484080, now seen corresponding path program 1 times [2022-03-18 01:00:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:00,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497990765] [2022-03-18 01:00:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:00,714 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:00,716 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash -297582015, now seen corresponding path program 126 times [2022-03-18 01:00:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:00,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160510792] [2022-03-18 01:00:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:01,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:01,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:01,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160510792] [2022-03-18 01:00:01,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160510792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:01,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296650380] [2022-03-18 01:00:01,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:01,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:01,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:01,944 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) [2022-03-18 01:00:01,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 01:00:01,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:00:01,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:00:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-18 01:00:02,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-18 01:00:02,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296650380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:02,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:02,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 4, 4] total 71 [2022-03-18 01:00:02,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [674941931] [2022-03-18 01:00:02,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [674941931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:02,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:02,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 01:00:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762237764] [2022-03-18 01:00:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:02,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 01:00:02,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 01:00:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 01:00:02,356 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:03,956 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2022-03-18 01:00:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 01:00:03,956 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-03-18 01:00:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:03,957 INFO L225 Difference]: With dead ends: 150 [2022-03-18 01:00:03,957 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 01:00:03,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6961, Invalid=11129, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 01:00:03,958 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:03,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 39 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:00:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 01:00:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-18 01:00:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2022-03-18 01:00:03,962 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 139 [2022-03-18 01:00:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:03,963 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2022-03-18 01:00:03,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2022-03-18 01:00:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 01:00:03,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:03,963 INFO L500 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:03,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:04,167 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,SelfDestructingSolverStorable127,SelfDestructingSolverStorable128 [2022-03-18 01:00:04,168 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash -596090466, now seen corresponding path program 127 times [2022-03-18 01:00:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78877955] [2022-03-18 01:00:04,394 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1721378736, now seen corresponding path program 1 times [2022-03-18 01:00:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073510728] [2022-03-18 01:00:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:04,397 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:04,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash -596090466, now seen corresponding path program 128 times [2022-03-18 01:00:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:04,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126995718] [2022-03-18 01:00:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:05,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:05,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126995718] [2022-03-18 01:00:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126995718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725201458] [2022-03-18 01:00:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:05,666 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) [2022-03-18 01:00:05,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 01:00:05,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 01:00:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:05,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:09,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725201458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:09,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:09,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-18 01:00:09,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:09,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78877955] [2022-03-18 01:00:09,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78877955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:09,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:09,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 01:00:09,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072269704] [2022-03-18 01:00:09,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:09,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 01:00:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 01:00:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 01:00:09,686 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:11,350 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2022-03-18 01:00:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 01:00:11,350 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-18 01:00:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:11,351 INFO L225 Difference]: With dead ends: 152 [2022-03-18 01:00:11,351 INFO L226 Difference]: Without dead ends: 145 [2022-03-18 01:00:11,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 01:00:11,354 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:11,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 44 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:00:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-18 01:00:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-18 01:00:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-03-18 01:00:11,367 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 141 [2022-03-18 01:00:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:11,367 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-03-18 01:00:11,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-03-18 01:00:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 01:00:11,367 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:11,368 INFO L500 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:11,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-18 01:00:11,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,SelfDestructingSolverStorable129,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:11,575 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash 300096955, now seen corresponding path program 129 times [2022-03-18 01:00:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:11,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088450091] [2022-03-18 01:00:11,776 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1662273392, now seen corresponding path program 1 times [2022-03-18 01:00:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:11,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090210438] [2022-03-18 01:00:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:11,778 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:11,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash 300096955, now seen corresponding path program 130 times [2022-03-18 01:00:11,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:11,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127790843] [2022-03-18 01:00:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127790843] [2022-03-18 01:00:13,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127790843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786868665] [2022-03-18 01:00:13,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:13,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:13,083 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) [2022-03-18 01:00:13,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 01:00:13,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:13,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 01:00:13,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:13,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:17,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786868665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:17,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:17,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-18 01:00:17,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:17,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088450091] [2022-03-18 01:00:17,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088450091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:17,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:17,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 01:00:17,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272784874] [2022-03-18 01:00:17,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:17,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 01:00:17,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 01:00:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 01:00:17,202 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:18,963 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-03-18 01:00:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 01:00:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-18 01:00:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:18,964 INFO L225 Difference]: With dead ends: 154 [2022-03-18 01:00:18,964 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 01:00:18,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 01:00:18,965 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:18,966 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 01:00:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-18 01:00:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2022-03-18 01:00:18,971 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 143 [2022-03-18 01:00:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:18,971 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2022-03-18 01:00:18,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2022-03-18 01:00:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 01:00:18,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:18,972 INFO L500 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:18,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:19,186 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,SelfDestructingSolverStorable131,SelfDestructingSolverStorable132 [2022-03-18 01:00:19,186 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:19,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1752217960, now seen corresponding path program 131 times [2022-03-18 01:00:19,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:19,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463091684] [2022-03-18 01:00:19,408 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1603168048, now seen corresponding path program 1 times [2022-03-18 01:00:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:19,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046678942] [2022-03-18 01:00:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:19,411 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:19,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1752217960, now seen corresponding path program 132 times [2022-03-18 01:00:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:19,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028854186] [2022-03-18 01:00:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:19,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:20,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:20,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028854186] [2022-03-18 01:00:20,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028854186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089644193] [2022-03-18 01:00:20,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:20,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:20,764 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) [2022-03-18 01:00:20,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 01:00:20,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:00:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:00:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-18 01:00:21,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-18 01:00:21,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089644193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:21,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:21,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 4, 4] total 74 [2022-03-18 01:00:21,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:21,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463091684] [2022-03-18 01:00:21,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463091684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:21,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:21,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 01:00:21,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048880149] [2022-03-18 01:00:21,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:21,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 01:00:21,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 01:00:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 01:00:21,196 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:22,950 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2022-03-18 01:00:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 01:00:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-18 01:00:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:22,951 INFO L225 Difference]: With dead ends: 156 [2022-03-18 01:00:22,951 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 01:00:22,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7588, Invalid=12152, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 01:00:22,953 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:22,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 59 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 01:00:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-18 01:00:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-03-18 01:00:22,958 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 145 [2022-03-18 01:00:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:22,958 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-03-18 01:00:22,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-03-18 01:00:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 01:00:22,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:22,959 INFO L500 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:22,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:23,168 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,SelfDestructingSolverStorable133,SelfDestructingSolverStorable134 [2022-03-18 01:00:23,168 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1658104885, now seen corresponding path program 133 times [2022-03-18 01:00:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571829032] [2022-03-18 01:00:23,349 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1544062704, now seen corresponding path program 1 times [2022-03-18 01:00:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:23,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771136623] [2022-03-18 01:00:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:23,352 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:23,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1658104885, now seen corresponding path program 134 times [2022-03-18 01:00:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648520303] [2022-03-18 01:00:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:24,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:24,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648520303] [2022-03-18 01:00:24,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648520303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517549511] [2022-03-18 01:00:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:24,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:24,758 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) [2022-03-18 01:00:24,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 01:00:24,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:24,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 01:00:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:25,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:29,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517549511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:29,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:29,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 01:00:29,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:29,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571829032] [2022-03-18 01:00:29,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571829032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:29,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:29,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 01:00:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552691986] [2022-03-18 01:00:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:29,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 01:00:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 01:00:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 01:00:29,095 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:30,905 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-03-18 01:00:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 01:00:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-18 01:00:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:30,906 INFO L225 Difference]: With dead ends: 158 [2022-03-18 01:00:30,906 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 01:00:30,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-18 01:00:30,908 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:30,908 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 01:00:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-18 01:00:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-03-18 01:00:30,913 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2022-03-18 01:00:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:30,913 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-03-18 01:00:30,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-03-18 01:00:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 01:00:30,913 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:30,913 INFO L500 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:30,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-18 01:00:31,117 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,SelfDestructingSolverStorable135,SelfDestructingSolverStorable136 [2022-03-18 01:00:31,117 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1918312082, now seen corresponding path program 135 times [2022-03-18 01:00:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630482534] [2022-03-18 01:00:31,293 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1484957360, now seen corresponding path program 1 times [2022-03-18 01:00:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934320201] [2022-03-18 01:00:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:31,295 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:31,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1918312082, now seen corresponding path program 136 times [2022-03-18 01:00:31,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235348342] [2022-03-18 01:00:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:32,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:32,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235348342] [2022-03-18 01:00:32,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235348342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358845393] [2022-03-18 01:00:32,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:32,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:32,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:32,697 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) [2022-03-18 01:00:32,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 01:00:32,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 01:00:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:32,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358845393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:37,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:37,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-03-18 01:00:37,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630482534] [2022-03-18 01:00:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630482534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:37,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:37,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 01:00:37,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392440188] [2022-03-18 01:00:37,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:37,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 01:00:37,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 01:00:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 01:00:37,012 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:38,912 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-03-18 01:00:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 01:00:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-18 01:00:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:38,913 INFO L225 Difference]: With dead ends: 160 [2022-03-18 01:00:38,913 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 01:00:38,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=19602, Invalid=24708, Unknown=0, NotChecked=0, Total=44310 [2022-03-18 01:00:38,916 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:38,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 49 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 01:00:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-18 01:00:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-03-18 01:00:38,921 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 149 [2022-03-18 01:00:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:38,921 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-03-18 01:00:38,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-03-18 01:00:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 01:00:38,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:38,922 INFO L500 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:38,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-18 01:00:39,135 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,SelfDestructingSolverStorable137,SelfDestructingSolverStorable138 [2022-03-18 01:00:39,135 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1425642065, now seen corresponding path program 137 times [2022-03-18 01:00:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:39,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1357811817] [2022-03-18 01:00:39,395 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1425852016, now seen corresponding path program 1 times [2022-03-18 01:00:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075552759] [2022-03-18 01:00:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:39,398 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:39,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1425642065, now seen corresponding path program 138 times [2022-03-18 01:00:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713496841] [2022-03-18 01:00:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:40,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:40,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713496841] [2022-03-18 01:00:40,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713496841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061943929] [2022-03-18 01:00:40,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:00:40,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:40,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:40,885 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) [2022-03-18 01:00:40,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 01:00:40,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:00:40,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:00:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-18 01:00:41,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-18 01:00:41,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061943929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:41,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:41,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 4, 4] total 77 [2022-03-18 01:00:41,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1357811817] [2022-03-18 01:00:41,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1357811817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:41,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:41,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 01:00:41,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93188681] [2022-03-18 01:00:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:41,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 01:00:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 01:00:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 01:00:41,377 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:43,288 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2022-03-18 01:00:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 01:00:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-18 01:00:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:43,290 INFO L225 Difference]: With dead ends: 162 [2022-03-18 01:00:43,291 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 01:00:43,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8242, Invalid=13220, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 01:00:43,293 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:43,293 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 01:00:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-18 01:00:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-03-18 01:00:43,298 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 151 [2022-03-18 01:00:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:43,298 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-03-18 01:00:43,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-03-18 01:00:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 01:00:43,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:43,299 INFO L500 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:43,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 01:00:43,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,SelfDestructingSolverStorable139,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:43,499 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1964927372, now seen corresponding path program 139 times [2022-03-18 01:00:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369007974] [2022-03-18 01:00:43,753 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1366746672, now seen corresponding path program 1 times [2022-03-18 01:00:43,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:43,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9190629] [2022-03-18 01:00:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:43,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:43,756 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:43,758 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1964927372, now seen corresponding path program 140 times [2022-03-18 01:00:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:43,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716394562] [2022-03-18 01:00:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:43,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:45,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716394562] [2022-03-18 01:00:45,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716394562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154753735] [2022-03-18 01:00:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:00:45,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:45,304 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) [2022-03-18 01:00:45,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 01:00:45,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:00:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:45,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 01:00:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:45,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:49,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154753735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:49,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-18 01:00:49,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369007974] [2022-03-18 01:00:49,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369007974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:49,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 01:00:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889404340] [2022-03-18 01:00:49,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:49,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 01:00:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 01:00:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 01:00:49,999 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:51,982 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2022-03-18 01:00:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 01:00:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-18 01:00:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:51,987 INFO L225 Difference]: With dead ends: 164 [2022-03-18 01:00:51,987 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 01:00:51,990 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-18 01:00:51,990 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:51,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 24 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:00:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 01:00:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-18 01:00:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-03-18 01:00:51,995 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 153 [2022-03-18 01:00:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:51,995 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-03-18 01:00:51,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:00:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-03-18 01:00:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 01:00:51,996 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:51,996 INFO L500 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:52,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 01:00:52,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,SelfDestructingSolverStorable142,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:52,211 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash 421978665, now seen corresponding path program 141 times [2022-03-18 01:00:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:52,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247203061] [2022-03-18 01:00:52,475 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:00:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1307641328, now seen corresponding path program 1 times [2022-03-18 01:00:52,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:52,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915301425] [2022-03-18 01:00:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:52,478 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:00:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:00:52,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:00:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 421978665, now seen corresponding path program 142 times [2022-03-18 01:00:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038366662] [2022-03-18 01:00:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:52,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:54,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038366662] [2022-03-18 01:00:54,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038366662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:00:54,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226441759] [2022-03-18 01:00:54,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:00:54,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:00:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:00:54,018 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) [2022-03-18 01:00:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 01:00:54,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:00:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:00:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 01:00:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:00:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:54,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:00:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:58,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226441759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:00:58,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:00:58,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-03-18 01:00:58,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:58,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247203061] [2022-03-18 01:00:58,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247203061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:58,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:58,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 01:00:58,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829305931] [2022-03-18 01:00:58,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:58,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 01:00:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:58,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 01:00:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 01:00:58,896 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:00,990 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-03-18 01:01:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 01:01:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-18 01:01:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:00,991 INFO L225 Difference]: With dead ends: 166 [2022-03-18 01:01:00,991 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 01:01:00,994 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=21318, Invalid=26862, Unknown=0, NotChecked=0, Total=48180 [2022-03-18 01:01:00,994 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:00,994 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 54 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 01:01:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-18 01:01:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-03-18 01:01:01,000 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 155 [2022-03-18 01:01:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:01,000 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-03-18 01:01:01,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-03-18 01:01:01,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 01:01:01,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:01,001 INFO L500 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:01,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-18 01:01:01,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-18 01:01:01,214 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash -588011642, now seen corresponding path program 143 times [2022-03-18 01:01:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:01,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592916989] [2022-03-18 01:01:01,473 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1248535984, now seen corresponding path program 1 times [2022-03-18 01:01:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:01,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004251658] [2022-03-18 01:01:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:01,476 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:01,478 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -588011642, now seen corresponding path program 144 times [2022-03-18 01:01:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496956816] [2022-03-18 01:01:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:03,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496956816] [2022-03-18 01:01:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496956816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152954110] [2022-03-18 01:01:03,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:01:03,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:03,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:03,093 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) [2022-03-18 01:01:03,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 01:01:03,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:01:03,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:01:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-18 01:01:03,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-18 01:01:03,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152954110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:03,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:03,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 4, 4] total 80 [2022-03-18 01:01:03,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:03,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592916989] [2022-03-18 01:01:03,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592916989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:03,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:03,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 01:01:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161530309] [2022-03-18 01:01:03,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:03,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 01:01:03,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:03,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 01:01:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 01:01:03,556 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:05,650 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2022-03-18 01:01:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 01:01:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-18 01:01:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:05,651 INFO L225 Difference]: With dead ends: 168 [2022-03-18 01:01:05,651 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 01:01:05,652 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8923, Invalid=14333, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 01:01:05,652 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:05,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 44 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 01:01:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-18 01:01:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-03-18 01:01:05,658 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2022-03-18 01:01:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:05,659 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-03-18 01:01:05,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-03-18 01:01:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-18 01:01:05,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:05,659 INFO L500 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:05,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:05,860 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,SelfDestructingSolverStorable145,SelfDestructingSolverStorable146 [2022-03-18 01:01:05,860 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash -526087773, now seen corresponding path program 145 times [2022-03-18 01:01:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:05,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392177411] [2022-03-18 01:01:06,043 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1189430640, now seen corresponding path program 1 times [2022-03-18 01:01:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450027869] [2022-03-18 01:01:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:06,046 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:06,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash -526087773, now seen corresponding path program 146 times [2022-03-18 01:01:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322578262] [2022-03-18 01:01:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:07,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322578262] [2022-03-18 01:01:07,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322578262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561606884] [2022-03-18 01:01:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:01:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:07,684 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) [2022-03-18 01:01:07,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 01:01:07,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:01:07,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 01:01:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:07,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561606884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:12,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:12,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-18 01:01:12,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392177411] [2022-03-18 01:01:12,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392177411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:12,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:12,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 01:01:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422595867] [2022-03-18 01:01:12,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:12,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 01:01:12,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 01:01:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-18 01:01:12,821 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:15,008 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2022-03-18 01:01:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 01:01:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-18 01:01:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:15,009 INFO L225 Difference]: With dead ends: 170 [2022-03-18 01:01:15,009 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 01:01:15,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-18 01:01:15,012 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:15,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 44 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 01:01:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-18 01:01:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-03-18 01:01:15,017 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 159 [2022-03-18 01:01:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:15,017 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-03-18 01:01:15,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-03-18 01:01:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 01:01:15,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:15,018 INFO L500 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:15,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-18 01:01:15,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-18 01:01:15,226 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1146791808, now seen corresponding path program 147 times [2022-03-18 01:01:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:15,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455789960] [2022-03-18 01:01:15,493 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:15,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1130325296, now seen corresponding path program 1 times [2022-03-18 01:01:15,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:15,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359484728] [2022-03-18 01:01:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:15,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:15,496 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:15,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:15,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1146791808, now seen corresponding path program 148 times [2022-03-18 01:01:15,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:15,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886547909] [2022-03-18 01:01:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:15,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:17,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:17,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886547909] [2022-03-18 01:01:17,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886547909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:17,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496106587] [2022-03-18 01:01:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:01:17,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:17,148 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) [2022-03-18 01:01:17,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 01:01:17,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:01:17,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 01:01:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:17,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496106587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:22,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:22,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-18 01:01:22,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [455789960] [2022-03-18 01:01:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [455789960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:22,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:22,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 01:01:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429427297] [2022-03-18 01:01:22,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:22,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 01:01:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 01:01:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 01:01:22,365 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:24,527 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-03-18 01:01:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 01:01:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-18 01:01:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:24,528 INFO L225 Difference]: With dead ends: 172 [2022-03-18 01:01:24,529 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 01:01:24,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=23106, Invalid=29106, Unknown=0, NotChecked=0, Total=52212 [2022-03-18 01:01:24,532 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:24,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 01:01:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-18 01:01:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-03-18 01:01:24,537 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 161 [2022-03-18 01:01:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:24,537 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-03-18 01:01:24,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-03-18 01:01:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-18 01:01:24,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:24,538 INFO L500 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:24,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-18 01:01:24,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,SelfDestructingSolverStorable149,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:24,751 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -642915299, now seen corresponding path program 149 times [2022-03-18 01:01:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:24,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [278594729] [2022-03-18 01:01:25,011 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1071219952, now seen corresponding path program 1 times [2022-03-18 01:01:25,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:25,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271746834] [2022-03-18 01:01:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:25,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:25,014 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:25,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash -642915299, now seen corresponding path program 150 times [2022-03-18 01:01:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921239393] [2022-03-18 01:01:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:26,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921239393] [2022-03-18 01:01:26,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921239393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003121039] [2022-03-18 01:01:26,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:01:26,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:26,698 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) [2022-03-18 01:01:26,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 01:01:26,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:01:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:01:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-18 01:01:26,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-18 01:01:27,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003121039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:27,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:27,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 4, 4] total 83 [2022-03-18 01:01:27,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:27,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [278594729] [2022-03-18 01:01:27,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [278594729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:27,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:27,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 01:01:27,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041463125] [2022-03-18 01:01:27,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:27,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 01:01:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 01:01:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 01:01:27,180 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:29,360 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2022-03-18 01:01:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 01:01:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-18 01:01:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:29,361 INFO L225 Difference]: With dead ends: 174 [2022-03-18 01:01:29,361 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 01:01:29,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9631, Invalid=15491, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 01:01:29,363 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:29,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 01:01:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-18 01:01:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-03-18 01:01:29,368 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 163 [2022-03-18 01:01:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:29,369 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-03-18 01:01:29,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-03-18 01:01:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-18 01:01:29,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:29,369 INFO L500 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:29,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:29,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2022-03-18 01:01:29,570 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1748894598, now seen corresponding path program 151 times [2022-03-18 01:01:29,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:29,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855904814] [2022-03-18 01:01:29,833 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1012114608, now seen corresponding path program 1 times [2022-03-18 01:01:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:29,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732226919] [2022-03-18 01:01:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:29,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:29,836 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:29,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1748894598, now seen corresponding path program 152 times [2022-03-18 01:01:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343077496] [2022-03-18 01:01:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:31,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:31,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:31,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343077496] [2022-03-18 01:01:31,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343077496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:31,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622528606] [2022-03-18 01:01:31,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:01:31,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:31,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:31,627 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) [2022-03-18 01:01:31,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 01:01:31,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:01:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:31,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-18 01:01:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:31,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:37,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622528606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:37,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:37,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-18 01:01:37,068 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855904814] [2022-03-18 01:01:37,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855904814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:37,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:37,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 01:01:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389059824] [2022-03-18 01:01:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:37,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 01:01:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 01:01:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 01:01:37,071 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:39,391 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-03-18 01:01:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 01:01:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-18 01:01:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:39,392 INFO L225 Difference]: With dead ends: 176 [2022-03-18 01:01:39,392 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 01:01:39,394 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-18 01:01:39,394 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:39,395 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 01:01:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-18 01:01:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-03-18 01:01:39,400 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 165 [2022-03-18 01:01:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:39,400 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-03-18 01:01:39,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-03-18 01:01:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 01:01:39,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:39,401 INFO L500 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:39,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:39,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,SelfDestructingSolverStorable154,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:39,609 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 556888471, now seen corresponding path program 153 times [2022-03-18 01:01:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:39,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519480726] [2022-03-18 01:01:39,805 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -953009264, now seen corresponding path program 1 times [2022-03-18 01:01:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812865153] [2022-03-18 01:01:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:39,808 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:39,811 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:39,811 INFO L85 PathProgramCache]: Analyzing trace with hash 556888471, now seen corresponding path program 154 times [2022-03-18 01:01:39,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:39,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632132972] [2022-03-18 01:01:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:41,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632132972] [2022-03-18 01:01:41,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632132972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717991649] [2022-03-18 01:01:41,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:01:41,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:41,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:41,634 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) [2022-03-18 01:01:41,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 01:01:41,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:01:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 01:01:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:41,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:47,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717991649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:47,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:47,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-03-18 01:01:47,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519480726] [2022-03-18 01:01:47,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519480726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:47,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:47,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 01:01:47,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492737619] [2022-03-18 01:01:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:47,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 01:01:47,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 01:01:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 01:01:47,244 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:49,624 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-03-18 01:01:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 01:01:49,624 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-18 01:01:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:49,625 INFO L225 Difference]: With dead ends: 178 [2022-03-18 01:01:49,625 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 01:01:49,627 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=24966, Invalid=31440, Unknown=0, NotChecked=0, Total=56406 [2022-03-18 01:01:49,627 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:49,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 01:01:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-18 01:01:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2022-03-18 01:01:49,633 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2022-03-18 01:01:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:49,633 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2022-03-18 01:01:49,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2022-03-18 01:01:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-18 01:01:49,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:49,634 INFO L500 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:49,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:49,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-18 01:01:49,843 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:49,844 INFO L85 PathProgramCache]: Analyzing trace with hash 211293044, now seen corresponding path program 155 times [2022-03-18 01:01:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094852621] [2022-03-18 01:01:50,113 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -893903920, now seen corresponding path program 1 times [2022-03-18 01:01:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:50,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551763133] [2022-03-18 01:01:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:50,116 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:50,118 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 211293044, now seen corresponding path program 156 times [2022-03-18 01:01:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:50,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962804786] [2022-03-18 01:01:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:51,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:51,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962804786] [2022-03-18 01:01:51,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962804786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100618890] [2022-03-18 01:01:51,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:01:51,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:51,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:51,975 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) [2022-03-18 01:01:51,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 01:01:52,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:01:52,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:01:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 1 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-18 01:01:52,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:01:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 1 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-18 01:01:52,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100618890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:01:52,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:01:52,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 4, 4] total 86 [2022-03-18 01:01:52,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094852621] [2022-03-18 01:01:52,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094852621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:52,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:52,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 01:01:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736884914] [2022-03-18 01:01:52,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:52,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 01:01:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 01:01:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 01:01:52,478 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:54,876 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2022-03-18 01:01:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 01:01:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-18 01:01:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:54,877 INFO L225 Difference]: With dead ends: 180 [2022-03-18 01:01:54,877 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 01:01:54,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10366, Invalid=16694, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 01:01:54,879 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:54,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 54 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:01:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 01:01:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-18 01:01:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-03-18 01:01:54,892 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 169 [2022-03-18 01:01:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:54,893 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-03-18 01:01:54,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:01:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-03-18 01:01:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-18 01:01:54,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:54,893 INFO L500 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:54,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 01:01:55,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,SelfDestructingSolverStorable158,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:55,095 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1193430511, now seen corresponding path program 157 times [2022-03-18 01:01:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:55,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413787580] [2022-03-18 01:01:55,300 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:01:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash -834798576, now seen corresponding path program 1 times [2022-03-18 01:01:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546715593] [2022-03-18 01:01:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:55,302 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:01:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:01:55,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:01:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1193430511, now seen corresponding path program 158 times [2022-03-18 01:01:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:55,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140455283] [2022-03-18 01:01:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140455283] [2022-03-18 01:01:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140455283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:01:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388439924] [2022-03-18 01:01:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:01:57,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:01:57,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:01:57,181 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) [2022-03-18 01:01:57,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 01:01:57,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:01:57,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:01:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 01:01:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:01:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:57,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:03,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388439924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:03,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:03,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-18 01:02:03,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413787580] [2022-03-18 01:02:03,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413787580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:03,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:03,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 01:02:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499226104] [2022-03-18 01:02:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:03,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 01:02:03,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 01:02:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 01:02:03,006 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:05,457 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-03-18 01:02:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 01:02:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-18 01:02:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:05,458 INFO L225 Difference]: With dead ends: 182 [2022-03-18 01:02:05,458 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 01:02:05,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-18 01:02:05,460 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:05,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 39 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:02:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 01:02:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-18 01:02:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2022-03-18 01:02:05,466 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 171 [2022-03-18 01:02:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:05,466 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2022-03-18 01:02:05,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2022-03-18 01:02:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 01:02:05,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:05,467 INFO L500 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:05,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:05,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160,SelfDestructingSolverStorable159 [2022-03-18 01:02:05,683 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931374, now seen corresponding path program 159 times [2022-03-18 01:02:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2071486748] [2022-03-18 01:02:05,948 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:02:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash -775693232, now seen corresponding path program 1 times [2022-03-18 01:02:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:05,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184147224] [2022-03-18 01:02:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:05,951 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:05,953 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931374, now seen corresponding path program 160 times [2022-03-18 01:02:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:05,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88710467] [2022-03-18 01:02:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:07,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88710467] [2022-03-18 01:02:07,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88710467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10311925] [2022-03-18 01:02:07,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:02:07,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:07,861 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) [2022-03-18 01:02:07,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 01:02:07,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:02:07,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 01:02:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:08,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:13,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10311925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:13,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:13,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-03-18 01:02:13,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:13,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2071486748] [2022-03-18 01:02:13,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2071486748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:13,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:13,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 01:02:13,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553719825] [2022-03-18 01:02:13,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:13,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 01:02:13,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 01:02:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-03-18 01:02:13,774 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:16,243 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-03-18 01:02:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 01:02:16,243 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-18 01:02:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:16,244 INFO L225 Difference]: With dead ends: 184 [2022-03-18 01:02:16,244 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 01:02:16,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=26898, Invalid=33864, Unknown=0, NotChecked=0, Total=60762 [2022-03-18 01:02:16,247 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:16,247 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:02:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 01:02:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-18 01:02:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-03-18 01:02:16,253 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 173 [2022-03-18 01:02:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:16,253 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-03-18 01:02:16,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-03-18 01:02:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 01:02:16,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:16,254 INFO L500 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:16,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:16,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-18 01:02:16,470 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash 656483723, now seen corresponding path program 161 times [2022-03-18 01:02:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:16,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585541824] [2022-03-18 01:02:16,701 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:02:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash -716587888, now seen corresponding path program 1 times [2022-03-18 01:02:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415921024] [2022-03-18 01:02:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:16,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:16,704 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:16,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 656483723, now seen corresponding path program 162 times [2022-03-18 01:02:16,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:16,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836476850] [2022-03-18 01:02:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:18,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836476850] [2022-03-18 01:02:18,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836476850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764179495] [2022-03-18 01:02:18,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:02:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:18,662 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) [2022-03-18 01:02:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 01:02:18,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:02:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:02:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-18 01:02:18,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-18 01:02:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764179495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:19,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:19,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 4, 4] total 89 [2022-03-18 01:02:19,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585541824] [2022-03-18 01:02:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585541824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:19,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:19,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 01:02:19,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802393930] [2022-03-18 01:02:19,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:19,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 01:02:19,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:19,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 01:02:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 01:02:19,176 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:21,749 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2022-03-18 01:02:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 01:02:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-18 01:02:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:21,750 INFO L225 Difference]: With dead ends: 186 [2022-03-18 01:02:21,750 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 01:02:21,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11128, Invalid=17942, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 01:02:21,752 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:21,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:02:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 01:02:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-18 01:02:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2022-03-18 01:02:21,759 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 175 [2022-03-18 01:02:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:21,759 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2022-03-18 01:02:21,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2022-03-18 01:02:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-18 01:02:21,760 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:21,760 INFO L500 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:21,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:21,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,SelfDestructingSolverStorable164,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:21,968 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1433049704, now seen corresponding path program 163 times [2022-03-18 01:02:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753320021] [2022-03-18 01:02:22,186 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:02:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash -657482544, now seen corresponding path program 1 times [2022-03-18 01:02:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666657791] [2022-03-18 01:02:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:22,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:22,197 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:22,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1433049704, now seen corresponding path program 164 times [2022-03-18 01:02:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:22,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549905023] [2022-03-18 01:02:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:24,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:24,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549905023] [2022-03-18 01:02:24,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549905023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:24,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389265652] [2022-03-18 01:02:24,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:02:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:24,209 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) [2022-03-18 01:02:24,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 01:02:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:02:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:24,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 01:02:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:30,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389265652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:30,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:30,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-18 01:02:30,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:30,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753320021] [2022-03-18 01:02:30,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753320021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:30,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:30,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 01:02:30,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766777866] [2022-03-18 01:02:30,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:30,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 01:02:30,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 01:02:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 01:02:30,493 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:33,149 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-03-18 01:02:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 01:02:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-18 01:02:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:33,150 INFO L225 Difference]: With dead ends: 188 [2022-03-18 01:02:33,150 INFO L226 Difference]: Without dead ends: 181 [2022-03-18 01:02:33,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-18 01:02:33,153 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:33,153 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 54 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:02:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-18 01:02:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-03-18 01:02:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2022-03-18 01:02:33,159 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2022-03-18 01:02:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:33,159 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2022-03-18 01:02:33,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2022-03-18 01:02:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 01:02:33,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:33,160 INFO L500 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:33,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:33,375 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,SelfDestructingSolverStorable165,SelfDestructingSolverStorable166 [2022-03-18 01:02:33,375 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 388647941, now seen corresponding path program 165 times [2022-03-18 01:02:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:33,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331853807] [2022-03-18 01:02:33,590 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:02:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -598377200, now seen corresponding path program 1 times [2022-03-18 01:02:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:33,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888647728] [2022-03-18 01:02:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:33,593 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:33,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash 388647941, now seen corresponding path program 166 times [2022-03-18 01:02:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:33,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225287393] [2022-03-18 01:02:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:35,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225287393] [2022-03-18 01:02:35,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225287393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989938389] [2022-03-18 01:02:35,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:02:35,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:35,671 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) [2022-03-18 01:02:35,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 01:02:35,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:02:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 01:02:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:36,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989938389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:42,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:42,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-03-18 01:02:42,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:42,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331853807] [2022-03-18 01:02:42,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331853807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:42,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 01:02:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578811358] [2022-03-18 01:02:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:42,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 01:02:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 01:02:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 01:02:42,159 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:44,888 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-03-18 01:02:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 01:02:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-18 01:02:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:44,889 INFO L225 Difference]: With dead ends: 190 [2022-03-18 01:02:44,889 INFO L226 Difference]: Without dead ends: 183 [2022-03-18 01:02:44,891 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=28902, Invalid=36378, Unknown=0, NotChecked=0, Total=65280 [2022-03-18 01:02:44,892 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:44,892 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 44 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:02:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-18 01:02:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-03-18 01:02:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2022-03-18 01:02:44,905 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 179 [2022-03-18 01:02:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:44,906 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2022-03-18 01:02:44,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2022-03-18 01:02:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-18 01:02:44,907 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:44,907 INFO L500 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:44,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 01:02:45,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,SelfDestructingSolverStorable168,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:45,123 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1740900962, now seen corresponding path program 167 times [2022-03-18 01:02:45,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:45,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [547229311] [2022-03-18 01:02:45,393 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:02:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash -539271856, now seen corresponding path program 1 times [2022-03-18 01:02:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905765436] [2022-03-18 01:02:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:45,396 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:45,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1740900962, now seen corresponding path program 168 times [2022-03-18 01:02:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:45,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270598858] [2022-03-18 01:02:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:45,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:47,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:47,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270598858] [2022-03-18 01:02:47,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270598858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552630489] [2022-03-18 01:02:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:02:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:47,529 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) [2022-03-18 01:02:47,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 01:02:47,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:02:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:02:47,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 1 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-18 01:02:47,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 1 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-18 01:02:48,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552630489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:48,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:48,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 4, 4] total 92 [2022-03-18 01:02:48,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [547229311] [2022-03-18 01:02:48,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [547229311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:48,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:48,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 01:02:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013302354] [2022-03-18 01:02:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:48,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 01:02:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 01:02:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 01:02:48,064 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:50,767 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-03-18 01:02:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 01:02:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-18 01:02:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:50,768 INFO L225 Difference]: With dead ends: 192 [2022-03-18 01:02:50,768 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 01:02:50,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11917, Invalid=19235, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 01:02:50,770 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:50,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 39 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:02:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 01:02:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-18 01:02:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-03-18 01:02:50,776 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2022-03-18 01:02:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:50,776 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-03-18 01:02:50,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:02:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-03-18 01:02:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-18 01:02:50,777 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:50,777 INFO L500 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:50,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-18 01:02:50,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-18 01:02:50,991 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:50,992 INFO L85 PathProgramCache]: Analyzing trace with hash -119036545, now seen corresponding path program 169 times [2022-03-18 01:02:50,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1864470204] [2022-03-18 01:02:51,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:02:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash -480166512, now seen corresponding path program 1 times [2022-03-18 01:02:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:51,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393156715] [2022-03-18 01:02:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:51,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:51,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:02:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:02:51,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:02:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash -119036545, now seen corresponding path program 170 times [2022-03-18 01:02:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032552071] [2022-03-18 01:02:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032552071] [2022-03-18 01:02:53,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032552071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:02:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221925968] [2022-03-18 01:02:53,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:02:53,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:02:53,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:02:53,361 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) [2022-03-18 01:02:53,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 01:02:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:02:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:02:53,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 01:02:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:02:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:53,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:02:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:59,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221925968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:02:59,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:02:59,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-18 01:02:59,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1864470204] [2022-03-18 01:02:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1864470204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:59,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:59,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 01:02:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493237517] [2022-03-18 01:02:59,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:59,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 01:02:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 01:03:00,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 01:03:00,002 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:02,788 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2022-03-18 01:03:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 01:03:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-18 01:03:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:02,789 INFO L225 Difference]: With dead ends: 194 [2022-03-18 01:03:02,789 INFO L226 Difference]: Without dead ends: 187 [2022-03-18 01:03:02,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-18 01:03:02,792 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:02,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 44 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:03:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-18 01:03:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-18 01:03:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-03-18 01:03:02,798 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 183 [2022-03-18 01:03:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:02,798 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-03-18 01:03:02,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-03-18 01:03:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 01:03:02,799 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:02,799 INFO L500 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:02,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:03,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,SelfDestructingSolverStorable172,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:03,004 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash -812585636, now seen corresponding path program 171 times [2022-03-18 01:03:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:03,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1147139830] [2022-03-18 01:03:03,259 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:03:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -421061168, now seen corresponding path program 1 times [2022-03-18 01:03:03,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:03,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508784411] [2022-03-18 01:03:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:03,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:03,262 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:03,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash -812585636, now seen corresponding path program 172 times [2022-03-18 01:03:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:03,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938412140] [2022-03-18 01:03:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:05,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:05,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938412140] [2022-03-18 01:03:05,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938412140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:05,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665050962] [2022-03-18 01:03:05,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:03:05,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:05,413 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) [2022-03-18 01:03:05,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 01:03:05,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:03:05,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-18 01:03:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:05,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:03:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:12,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665050962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:03:12,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:03:12,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-03-18 01:03:12,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:12,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1147139830] [2022-03-18 01:03:12,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1147139830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:12,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:12,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 01:03:12,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627175977] [2022-03-18 01:03:12,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:12,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 01:03:12,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 01:03:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2022-03-18 01:03:12,264 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:15,185 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-03-18 01:03:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 01:03:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-18 01:03:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:15,186 INFO L225 Difference]: With dead ends: 196 [2022-03-18 01:03:15,186 INFO L226 Difference]: Without dead ends: 189 [2022-03-18 01:03:15,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=30978, Invalid=38982, Unknown=0, NotChecked=0, Total=69960 [2022-03-18 01:03:15,190 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:15,190 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 39 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:03:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-18 01:03:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-18 01:03:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.016304347826087) internal successors, (187), 184 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2022-03-18 01:03:15,200 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 185 [2022-03-18 01:03:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:15,200 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2022-03-18 01:03:15,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2022-03-18 01:03:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-18 01:03:15,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:15,201 INFO L500 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:15,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:15,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,SelfDestructingSolverStorable174,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:15,419 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1593331207, now seen corresponding path program 173 times [2022-03-18 01:03:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851573818] [2022-03-18 01:03:15,706 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:03:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash -361955824, now seen corresponding path program 1 times [2022-03-18 01:03:15,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:15,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145058151] [2022-03-18 01:03:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:15,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:15,709 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:15,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1593331207, now seen corresponding path program 174 times [2022-03-18 01:03:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:15,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250304081] [2022-03-18 01:03:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:15,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:18,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:18,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:18,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250304081] [2022-03-18 01:03:18,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250304081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:18,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089083021] [2022-03-18 01:03:18,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:03:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:18,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:18,040 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) [2022-03-18 01:03:18,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 01:03:18,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:03:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:18,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:03:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-18 01:03:18,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:03:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-18 01:03:18,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089083021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:03:18,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:03:18,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 4, 4] total 95 [2022-03-18 01:03:18,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:18,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851573818] [2022-03-18 01:03:18,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851573818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:18,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:18,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 01:03:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497717458] [2022-03-18 01:03:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:18,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 01:03:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 01:03:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 01:03:18,599 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:21,553 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2022-03-18 01:03:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 01:03:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-18 01:03:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:21,554 INFO L225 Difference]: With dead ends: 198 [2022-03-18 01:03:21,554 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 01:03:21,555 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12733, Invalid=20573, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 01:03:21,556 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:21,556 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 34 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:03:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 01:03:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-18 01:03:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2022-03-18 01:03:21,562 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2022-03-18 01:03:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:21,562 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2022-03-18 01:03:21,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2022-03-18 01:03:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-18 01:03:21,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:21,563 INFO L500 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:21,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-18 01:03:21,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,SelfDestructingSolverStorable176,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:21,763 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash -270548138, now seen corresponding path program 175 times [2022-03-18 01:03:21,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:21,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384158736] [2022-03-18 01:03:22,025 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:03:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash -302850480, now seen corresponding path program 1 times [2022-03-18 01:03:22,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:22,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514068761] [2022-03-18 01:03:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:22,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:22,028 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:22,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash -270548138, now seen corresponding path program 176 times [2022-03-18 01:03:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965437046] [2022-03-18 01:03:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:24,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:24,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:24,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965437046] [2022-03-18 01:03:24,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965437046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:24,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104959797] [2022-03-18 01:03:24,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:03:24,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:24,360 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) [2022-03-18 01:03:24,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 01:03:24,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:03:24,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-18 01:03:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:24,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:03:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104959797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:03:31,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:03:31,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-18 01:03:31,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:31,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384158736] [2022-03-18 01:03:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384158736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:31,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:31,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 01:03:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015382953] [2022-03-18 01:03:31,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:31,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 01:03:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 01:03:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 01:03:31,397 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:34,336 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2022-03-18 01:03:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 01:03:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-18 01:03:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:34,337 INFO L225 Difference]: With dead ends: 200 [2022-03-18 01:03:34,337 INFO L226 Difference]: Without dead ends: 193 [2022-03-18 01:03:34,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 01:03:34,340 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:34,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 19 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:03:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-18 01:03:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-03-18 01:03:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-03-18 01:03:34,345 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 189 [2022-03-18 01:03:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:34,346 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-03-18 01:03:34,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-03-18 01:03:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-18 01:03:34,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:34,346 INFO L500 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:34,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-18 01:03:34,564 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,SelfDestructingSolverStorable177,SelfDestructingSolverStorable178 [2022-03-18 01:03:34,564 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash -386338445, now seen corresponding path program 177 times [2022-03-18 01:03:34,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:34,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810516343] [2022-03-18 01:03:34,789 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:03:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash -243745136, now seen corresponding path program 1 times [2022-03-18 01:03:34,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:34,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967333803] [2022-03-18 01:03:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:34,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:34,792 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:34,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:34,794 INFO L85 PathProgramCache]: Analyzing trace with hash -386338445, now seen corresponding path program 178 times [2022-03-18 01:03:34,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:34,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104880073] [2022-03-18 01:03:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:37,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:37,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104880073] [2022-03-18 01:03:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104880073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800304314] [2022-03-18 01:03:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:03:37,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:37,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:37,096 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) [2022-03-18 01:03:37,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 01:03:37,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:03:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 01:03:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:03:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800304314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:03:44,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:03:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-03-18 01:03:44,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810516343] [2022-03-18 01:03:44,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810516343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:44,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 01:03:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550965987] [2022-03-18 01:03:44,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:44,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 01:03:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 01:03:44,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16655, Invalid=17017, Unknown=0, NotChecked=0, Total=33672 [2022-03-18 01:03:44,177 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:47,204 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-03-18 01:03:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-18 01:03:47,204 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-18 01:03:47,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:47,205 INFO L225 Difference]: With dead ends: 202 [2022-03-18 01:03:47,205 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 01:03:47,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=33126, Invalid=41676, Unknown=0, NotChecked=0, Total=74802 [2022-03-18 01:03:47,208 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:47,208 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:03:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 01:03:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-18 01:03:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2022-03-18 01:03:47,214 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 191 [2022-03-18 01:03:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:47,214 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2022-03-18 01:03:47,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2022-03-18 01:03:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-18 01:03:47,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:47,215 INFO L500 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:47,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:47,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180,SelfDestructingSolverStorable179 [2022-03-18 01:03:47,415 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash 8326224, now seen corresponding path program 179 times [2022-03-18 01:03:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683920883] [2022-03-18 01:03:47,633 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:03:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -184639792, now seen corresponding path program 1 times [2022-03-18 01:03:47,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:47,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660086245] [2022-03-18 01:03:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:47,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:47,636 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:47,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash 8326224, now seen corresponding path program 180 times [2022-03-18 01:03:47,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:47,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752859573] [2022-03-18 01:03:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:49,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752859573] [2022-03-18 01:03:49,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752859573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040495680] [2022-03-18 01:03:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:03:49,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:49,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:49,988 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) [2022-03-18 01:03:49,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 01:03:50,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:03:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:03:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 1 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-18 01:03:50,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:03:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 1 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-18 01:03:50,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040495680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:03:50,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:03:50,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 4, 4] total 98 [2022-03-18 01:03:50,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:50,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683920883] [2022-03-18 01:03:50,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683920883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:50,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:50,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 01:03:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796124143] [2022-03-18 01:03:50,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:50,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 01:03:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 01:03:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 01:03:50,545 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:53,554 INFO L93 Difference]: Finished difference Result 204 states and 208 transitions. [2022-03-18 01:03:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 01:03:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-18 01:03:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:53,555 INFO L225 Difference]: With dead ends: 204 [2022-03-18 01:03:53,555 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 01:03:53,556 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13576, Invalid=21956, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 01:03:53,557 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:53,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 39 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:03:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 01:03:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-03-18 01:03:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-03-18 01:03:53,562 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 193 [2022-03-18 01:03:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:53,563 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-03-18 01:03:53,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:03:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-03-18 01:03:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-18 01:03:53,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:53,563 INFO L500 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:53,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-18 01:03:53,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,SelfDestructingSolverStorable182,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:53,780 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951085, now seen corresponding path program 181 times [2022-03-18 01:03:53,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:53,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272929602] [2022-03-18 01:03:54,016 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:03:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash -125534448, now seen corresponding path program 1 times [2022-03-18 01:03:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:54,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714267153] [2022-03-18 01:03:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:54,019 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:03:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:03:54,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:03:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951085, now seen corresponding path program 182 times [2022-03-18 01:03:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:54,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055753065] [2022-03-18 01:03:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055753065] [2022-03-18 01:03:56,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055753065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:03:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25142987] [2022-03-18 01:03:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:03:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:03:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:03:56,397 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) [2022-03-18 01:03:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 01:03:56,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:03:56,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:03:56,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 01:03:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:03:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:56,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:03,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25142987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:03,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:03,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-18 01:04:03,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272929602] [2022-03-18 01:04:03,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272929602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:03,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:03,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 01:04:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697166897] [2022-03-18 01:04:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:03,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 01:04:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 01:04:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 01:04:03,847 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:07,086 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2022-03-18 01:04:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 01:04:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-18 01:04:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:07,088 INFO L225 Difference]: With dead ends: 206 [2022-03-18 01:04:07,088 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 01:04:07,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-03-18 01:04:07,091 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:07,091 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 54 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:04:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 01:04:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-18 01:04:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-03-18 01:04:07,097 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 195 [2022-03-18 01:04:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:07,097 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-03-18 01:04:07,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-03-18 01:04:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-18 01:04:07,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:07,098 INFO L500 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:07,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-18 01:04:07,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,SelfDestructingSolverStorable183,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:07,311 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1375909814, now seen corresponding path program 183 times [2022-03-18 01:04:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:07,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500220978] [2022-03-18 01:04:07,496 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:04:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash -66429104, now seen corresponding path program 1 times [2022-03-18 01:04:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:07,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694056530] [2022-03-18 01:04:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:07,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:07,499 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:07,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1375909814, now seen corresponding path program 184 times [2022-03-18 01:04:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:07,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352375769] [2022-03-18 01:04:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:07,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:09,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352375769] [2022-03-18 01:04:09,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352375769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:09,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288159480] [2022-03-18 01:04:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:04:09,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:09,927 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) [2022-03-18 01:04:09,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 01:04:09,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:04:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-18 01:04:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288159480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:17,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:17,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-18 01:04:17,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500220978] [2022-03-18 01:04:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500220978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:17,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:17,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 01:04:17,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867218832] [2022-03-18 01:04:17,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:17,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 01:04:17,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 01:04:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 01:04:17,429 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:20,573 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-03-18 01:04:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 01:04:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-18 01:04:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:20,574 INFO L225 Difference]: With dead ends: 208 [2022-03-18 01:04:20,574 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 01:04:20,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=35346, Invalid=44460, Unknown=0, NotChecked=0, Total=79806 [2022-03-18 01:04:20,576 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:20,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 29 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:04:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 01:04:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-18 01:04:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2022-03-18 01:04:20,582 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2022-03-18 01:04:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:20,582 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2022-03-18 01:04:20,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2022-03-18 01:04:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-18 01:04:20,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:20,583 INFO L500 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:20,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,SelfDestructingSolverStorable186,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:20,784 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1781986969, now seen corresponding path program 185 times [2022-03-18 01:04:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:20,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [340389631] [2022-03-18 01:04:21,008 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:04:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash -7323760, now seen corresponding path program 1 times [2022-03-18 01:04:21,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:21,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655860476] [2022-03-18 01:04:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:21,011 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:21,012 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1781986969, now seen corresponding path program 186 times [2022-03-18 01:04:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:21,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050956177] [2022-03-18 01:04:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:21,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050956177] [2022-03-18 01:04:23,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050956177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9035609] [2022-03-18 01:04:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:04:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:23,493 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) [2022-03-18 01:04:23,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 01:04:23,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:04:23,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:04:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 1 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-18 01:04:23,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 1 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-18 01:04:24,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9035609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:24,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:24,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 4, 4] total 101 [2022-03-18 01:04:24,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [340389631] [2022-03-18 01:04:24,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [340389631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:24,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:24,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 01:04:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927374993] [2022-03-18 01:04:24,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:24,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 01:04:24,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 01:04:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 01:04:24,073 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:27,314 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2022-03-18 01:04:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 01:04:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-18 01:04:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:27,315 INFO L225 Difference]: With dead ends: 210 [2022-03-18 01:04:27,315 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 01:04:27,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14446, Invalid=23384, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 01:04:27,317 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:27,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:04:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 01:04:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-18 01:04:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2022-03-18 01:04:27,323 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 199 [2022-03-18 01:04:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:27,323 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2022-03-18 01:04:27,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2022-03-18 01:04:27,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-18 01:04:27,324 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:27,324 INFO L500 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:27,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-18 01:04:27,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-18 01:04:27,525 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1180108988, now seen corresponding path program 187 times [2022-03-18 01:04:27,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:27,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773658944] [2022-03-18 01:04:27,721 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:04:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 51781584, now seen corresponding path program 1 times [2022-03-18 01:04:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019173153] [2022-03-18 01:04:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:27,723 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:27,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1180108988, now seen corresponding path program 188 times [2022-03-18 01:04:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:27,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671037254] [2022-03-18 01:04:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:27,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671037254] [2022-03-18 01:04:30,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671037254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472345898] [2022-03-18 01:04:30,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:04:30,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:30,291 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) [2022-03-18 01:04:30,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 01:04:30,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:04:30,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-18 01:04:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:30,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472345898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:38,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-18 01:04:38,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:38,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773658944] [2022-03-18 01:04:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773658944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:38,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 01:04:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807765381] [2022-03-18 01:04:38,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:38,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 01:04:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 01:04:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 01:04:38,134 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:41,441 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-03-18 01:04:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 01:04:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-18 01:04:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:41,442 INFO L225 Difference]: With dead ends: 212 [2022-03-18 01:04:41,442 INFO L226 Difference]: Without dead ends: 205 [2022-03-18 01:04:41,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=36866, Invalid=46366, Unknown=0, NotChecked=0, Total=83232 [2022-03-18 01:04:41,446 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:41,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 34 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:04:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-18 01:04:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-18 01:04:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-03-18 01:04:41,451 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 201 [2022-03-18 01:04:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:41,452 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-03-18 01:04:41,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-03-18 01:04:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-18 01:04:41,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:41,453 INFO L500 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:41,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-18 01:04:41,653 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,SelfDestructingSolverStorable190,SelfDestructingSolverStorable189 [2022-03-18 01:04:41,653 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1699013089, now seen corresponding path program 189 times [2022-03-18 01:04:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [841186779] [2022-03-18 01:04:41,826 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:04:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 110886928, now seen corresponding path program 1 times [2022-03-18 01:04:41,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:41,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552913495] [2022-03-18 01:04:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:41,829 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:41,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1699013089, now seen corresponding path program 190 times [2022-03-18 01:04:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:41,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992803662] [2022-03-18 01:04:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:41,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992803662] [2022-03-18 01:04:44,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992803662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442882459] [2022-03-18 01:04:44,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:04:44,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:44,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:44,430 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) [2022-03-18 01:04:44,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 01:04:44,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:04:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 01:04:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:44,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:52,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442882459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:52,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:52,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-03-18 01:04:52,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [841186779] [2022-03-18 01:04:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [841186779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:52,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:52,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 01:04:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599196881] [2022-03-18 01:04:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:52,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 01:04:52,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 01:04:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 01:04:52,442 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:55,826 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-03-18 01:04:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 01:04:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-18 01:04:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:55,827 INFO L225 Difference]: With dead ends: 214 [2022-03-18 01:04:55,827 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 01:04:55,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=37638, Invalid=47334, Unknown=0, NotChecked=0, Total=84972 [2022-03-18 01:04:55,831 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:55,831 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:04:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 01:04:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-18 01:04:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2022-03-18 01:04:55,837 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 203 [2022-03-18 01:04:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:55,837 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2022-03-18 01:04:55,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:04:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2022-03-18 01:04:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-18 01:04:55,838 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:55,838 INFO L500 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:55,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-18 01:04:56,051 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,SelfDestructingSolverStorable191,SelfDestructingSolverStorable192 [2022-03-18 01:04:56,051 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1718576834, now seen corresponding path program 191 times [2022-03-18 01:04:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179311010] [2022-03-18 01:04:56,313 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:04:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash 169992272, now seen corresponding path program 1 times [2022-03-18 01:04:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371130915] [2022-03-18 01:04:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:56,316 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:04:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:04:56,318 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:04:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1718576834, now seen corresponding path program 192 times [2022-03-18 01:04:56,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:56,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190841962] [2022-03-18 01:04:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:58,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:58,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:58,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190841962] [2022-03-18 01:04:58,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190841962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:04:58,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299378102] [2022-03-18 01:04:58,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:04:58,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:04:58,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:04:58,990 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) [2022-03-18 01:04:58,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 01:04:59,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:04:59,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:04:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:04:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:04:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-18 01:04:59,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:04:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-18 01:04:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299378102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:04:59,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:04:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 4, 4] total 104 [2022-03-18 01:04:59,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179311010] [2022-03-18 01:04:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179311010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:59,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 01:04:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191971831] [2022-03-18 01:04:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:59,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 01:04:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 01:04:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 01:04:59,570 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:02,974 INFO L93 Difference]: Finished difference Result 216 states and 220 transitions. [2022-03-18 01:05:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 01:05:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-18 01:05:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:02,975 INFO L225 Difference]: With dead ends: 216 [2022-03-18 01:05:02,975 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 01:05:02,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15343, Invalid=24857, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 01:05:02,977 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:02,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 34 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:05:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 01:05:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-18 01:05:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-03-18 01:05:02,983 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 205 [2022-03-18 01:05:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:02,983 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-03-18 01:05:02,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-03-18 01:05:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-18 01:05:02,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:02,984 INFO L500 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:03,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-18 01:05:03,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,SelfDestructingSolverStorable194,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:03,185 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:03,185 INFO L85 PathProgramCache]: Analyzing trace with hash -372511397, now seen corresponding path program 193 times [2022-03-18 01:05:03,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:03,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82743312] [2022-03-18 01:05:03,428 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:05:03,429 INFO L85 PathProgramCache]: Analyzing trace with hash 229097616, now seen corresponding path program 1 times [2022-03-18 01:05:03,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:03,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397340180] [2022-03-18 01:05:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:03,431 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:05:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:03,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:05:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -372511397, now seen corresponding path program 194 times [2022-03-18 01:05:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003594085] [2022-03-18 01:05:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:06,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:06,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003594085] [2022-03-18 01:05:06,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003594085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:05:06,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009919402] [2022-03-18 01:05:06,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:05:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:05:06,131 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) [2022-03-18 01:05:06,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 01:05:06,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:05:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:05:06,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 01:05:06,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:05:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:06,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:05:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009919402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:05:14,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:05:14,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-18 01:05:14,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82743312] [2022-03-18 01:05:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82743312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:14,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:14,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 01:05:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645430399] [2022-03-18 01:05:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:14,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 01:05:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:14,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 01:05:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19703, Invalid=20097, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 01:05:14,440 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:17,924 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2022-03-18 01:05:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-18 01:05:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-18 01:05:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:17,935 INFO L225 Difference]: With dead ends: 218 [2022-03-18 01:05:17,935 INFO L226 Difference]: Without dead ends: 211 [2022-03-18 01:05:17,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=39206, Invalid=49300, Unknown=0, NotChecked=0, Total=88506 [2022-03-18 01:05:17,939 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:17,939 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 49 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:05:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-18 01:05:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-18 01:05:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2022-03-18 01:05:17,948 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2022-03-18 01:05:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:17,948 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2022-03-18 01:05:17,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2022-03-18 01:05:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-18 01:05:17,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:17,951 INFO L500 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:17,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-18 01:05:18,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,SelfDestructingSolverStorable196,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:18,163 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash 411217464, now seen corresponding path program 195 times [2022-03-18 01:05:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:18,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [80218950] [2022-03-18 01:05:18,396 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:05:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash 288202960, now seen corresponding path program 1 times [2022-03-18 01:05:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:18,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324798002] [2022-03-18 01:05:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:18,398 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:05:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:18,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:05:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 411217464, now seen corresponding path program 196 times [2022-03-18 01:05:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:18,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642054469] [2022-03-18 01:05:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:21,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:21,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642054469] [2022-03-18 01:05:21,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642054469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:05:21,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043187531] [2022-03-18 01:05:21,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:05:21,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:21,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:05:21,161 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) [2022-03-18 01:05:21,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 01:05:21,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:05:21,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:05:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 01:05:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:05:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:21,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:05:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:29,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043187531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:05:29,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:05:29,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-03-18 01:05:29,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [80218950] [2022-03-18 01:05:29,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [80218950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:29,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:29,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-18 01:05:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251030456] [2022-03-18 01:05:29,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:29,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-18 01:05:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-18 01:05:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 01:05:29,639 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:33,228 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-03-18 01:05:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 01:05:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-18 01:05:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:33,229 INFO L225 Difference]: With dead ends: 220 [2022-03-18 01:05:33,229 INFO L226 Difference]: Without dead ends: 213 [2022-03-18 01:05:33,232 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=40002, Invalid=50298, Unknown=0, NotChecked=0, Total=90300 [2022-03-18 01:05:33,232 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:33,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 24 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:05:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-18 01:05:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-03-18 01:05:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2022-03-18 01:05:33,238 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 209 [2022-03-18 01:05:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:33,239 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2022-03-18 01:05:33,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2022-03-18 01:05:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-18 01:05:33,240 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:33,240 INFO L500 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:33,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 01:05:33,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,SelfDestructingSolverStorable198,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:33,441 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1955376085, now seen corresponding path program 197 times [2022-03-18 01:05:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836300113] [2022-03-18 01:05:33,628 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:05:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 347308304, now seen corresponding path program 1 times [2022-03-18 01:05:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:33,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232734090] [2022-03-18 01:05:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:33,631 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:05:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:33,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:05:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1955376085, now seen corresponding path program 198 times [2022-03-18 01:05:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203890577] [2022-03-18 01:05:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:36,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:36,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203890577] [2022-03-18 01:05:36,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203890577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:05:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421269158] [2022-03-18 01:05:36,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:05:36,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:05:36,439 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:05:36,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 01:05:36,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:05:36,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:05:36,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:05:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:05:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 1 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-18 01:05:36,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:05:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 1 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-18 01:05:37,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421269158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:05:37,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:05:37,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 4, 4] total 107 [2022-03-18 01:05:37,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:37,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836300113] [2022-03-18 01:05:37,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836300113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:37,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:37,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-18 01:05:37,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098673601] [2022-03-18 01:05:37,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:37,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 01:05:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:37,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 01:05:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 01:05:37,049 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:40,669 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2022-03-18 01:05:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-18 01:05:40,669 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-18 01:05:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:40,670 INFO L225 Difference]: With dead ends: 222 [2022-03-18 01:05:40,670 INFO L226 Difference]: Without dead ends: 215 [2022-03-18 01:05:40,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16267, Invalid=26375, Unknown=0, NotChecked=0, Total=42642 [2022-03-18 01:05:40,672 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:40,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 39 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:05:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-18 01:05:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-18 01:05:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-03-18 01:05:40,678 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 211 [2022-03-18 01:05:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:40,678 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-03-18 01:05:40,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-03-18 01:05:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 01:05:40,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:40,679 INFO L500 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:40,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-18 01:05:40,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,SelfDestructingSolverStorable200,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:40,880 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash -166873550, now seen corresponding path program 199 times [2022-03-18 01:05:40,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:40,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854373759] [2022-03-18 01:05:41,114 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:05:41,115 INFO L85 PathProgramCache]: Analyzing trace with hash 406413648, now seen corresponding path program 1 times [2022-03-18 01:05:41,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:41,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873152603] [2022-03-18 01:05:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:41,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:41,117 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:05:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:41,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:05:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash -166873550, now seen corresponding path program 200 times [2022-03-18 01:05:41,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:41,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462457971] [2022-03-18 01:05:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:41,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:44,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:44,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462457971] [2022-03-18 01:05:44,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462457971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:05:44,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801006402] [2022-03-18 01:05:44,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:05:44,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:44,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:05:44,005 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:05:44,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-18 01:05:44,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:05:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:05:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-18 01:05:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:05:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:05:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:52,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801006402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:05:52,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:05:52,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-03-18 01:05:52,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:52,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854373759] [2022-03-18 01:05:52,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854373759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:52,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:52,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-18 01:05:52,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953679137] [2022-03-18 01:05:52,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:52,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 01:05:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 01:05:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20912, Invalid=21318, Unknown=0, NotChecked=0, Total=42230 [2022-03-18 01:05:52,784 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:56,469 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-03-18 01:05:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 01:05:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-03-18 01:05:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:56,470 INFO L225 Difference]: With dead ends: 224 [2022-03-18 01:05:56,470 INFO L226 Difference]: Without dead ends: 217 [2022-03-18 01:05:56,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5649 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=41618, Invalid=52324, Unknown=0, NotChecked=0, Total=93942 [2022-03-18 01:05:56,473 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:56,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 44 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:05:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-18 01:05:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-18 01:05:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-03-18 01:05:56,479 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 213 [2022-03-18 01:05:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:56,479 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-03-18 01:05:56,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:05:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-03-18 01:05:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-18 01:05:56,480 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:56,480 INFO L500 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:56,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-18 01:05:56,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201,SelfDestructingSolverStorable202 [2022-03-18 01:05:56,684 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 460692815, now seen corresponding path program 201 times [2022-03-18 01:05:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:56,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1795295416] [2022-03-18 01:05:56,894 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:05:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 465518992, now seen corresponding path program 1 times [2022-03-18 01:05:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123397029] [2022-03-18 01:05:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:56,897 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:05:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:05:56,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:05:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash 460692815, now seen corresponding path program 202 times [2022-03-18 01:05:56,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:56,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119918446] [2022-03-18 01:05:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:56,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119918446] [2022-03-18 01:05:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119918446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:05:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723113372] [2022-03-18 01:05:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:05:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:05:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:05:59,797 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:05:59,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-18 01:05:59,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:05:59,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:05:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-18 01:05:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:06:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:00,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:06:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:08,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723113372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:06:08,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:06:08,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-03-18 01:06:08,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1795295416] [2022-03-18 01:06:08,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1795295416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:08,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:08,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-18 01:06:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149540803] [2022-03-18 01:06:08,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:08,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-18 01:06:08,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-18 01:06:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21323, Invalid=21733, Unknown=0, NotChecked=0, Total=43056 [2022-03-18 01:06:08,688 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:12,471 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-03-18 01:06:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-18 01:06:12,471 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-03-18 01:06:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:12,472 INFO L225 Difference]: With dead ends: 226 [2022-03-18 01:06:12,472 INFO L226 Difference]: Without dead ends: 219 [2022-03-18 01:06:12,476 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=42438, Invalid=53352, Unknown=0, NotChecked=0, Total=95790 [2022-03-18 01:06:12,476 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:12,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:06:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-18 01:06:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-18 01:06:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2022-03-18 01:06:12,483 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 215 [2022-03-18 01:06:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:12,483 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2022-03-18 01:06:12,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2022-03-18 01:06:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-18 01:06:12,484 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:12,484 INFO L500 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:12,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-18 01:06:12,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,SelfDestructingSolverStorable204,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:12,685 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2038419156, now seen corresponding path program 203 times [2022-03-18 01:06:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:12,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [115089831] [2022-03-18 01:06:12,907 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:06:12,907 INFO L85 PathProgramCache]: Analyzing trace with hash 524624336, now seen corresponding path program 1 times [2022-03-18 01:06:12,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:12,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148438059] [2022-03-18 01:06:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:12,909 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:06:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:12,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:06:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2038419156, now seen corresponding path program 204 times [2022-03-18 01:06:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:12,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174989155] [2022-03-18 01:06:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:12,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:15,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:15,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174989155] [2022-03-18 01:06:15,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174989155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:06:15,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370752353] [2022-03-18 01:06:15,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:06:15,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:06:15,847 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:06:15,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-18 01:06:15,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:06:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:06:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:06:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:06:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 1 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-18 01:06:16,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:06:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 1 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-18 01:06:16,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370752353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:06:16,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:06:16,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 4, 4] total 110 [2022-03-18 01:06:16,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:16,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [115089831] [2022-03-18 01:06:16,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [115089831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:16,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:16,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-18 01:06:16,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768022139] [2022-03-18 01:06:16,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:16,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-18 01:06:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:16,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-18 01:06:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 01:06:16,448 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:20,208 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2022-03-18 01:06:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 01:06:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-03-18 01:06:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:20,209 INFO L225 Difference]: With dead ends: 228 [2022-03-18 01:06:20,209 INFO L226 Difference]: Without dead ends: 221 [2022-03-18 01:06:20,211 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17218, Invalid=27938, Unknown=0, NotChecked=0, Total=45156 [2022-03-18 01:06:20,211 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:20,211 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 44 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:06:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-18 01:06:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-18 01:06:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2022-03-18 01:06:20,217 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2022-03-18 01:06:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:20,217 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2022-03-18 01:06:20,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2022-03-18 01:06:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-18 01:06:20,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:20,218 INFO L500 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:20,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-18 01:06:20,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205,SelfDestructingSolverStorable206 [2022-03-18 01:06:20,435 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1496662473, now seen corresponding path program 205 times [2022-03-18 01:06:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:20,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701254366] [2022-03-18 01:06:20,689 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:06:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash 583729680, now seen corresponding path program 1 times [2022-03-18 01:06:20,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:20,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399604135] [2022-03-18 01:06:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:20,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:20,691 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:06:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:20,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:06:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1496662473, now seen corresponding path program 206 times [2022-03-18 01:06:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:20,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753428760] [2022-03-18 01:06:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:23,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:23,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753428760] [2022-03-18 01:06:23,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753428760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:06:23,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100280014] [2022-03-18 01:06:23,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:06:23,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:06:23,678 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:06:23,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-18 01:06:23,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:06:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:06:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 01:06:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:06:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:06:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100280014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:06:32,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:06:32,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-03-18 01:06:32,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:32,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701254366] [2022-03-18 01:06:32,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701254366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:32,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:32,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-18 01:06:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598019571] [2022-03-18 01:06:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:32,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-18 01:06:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-18 01:06:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 01:06:32,887 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:36,719 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2022-03-18 01:06:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-18 01:06:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-03-18 01:06:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:36,720 INFO L225 Difference]: With dead ends: 230 [2022-03-18 01:06:36,720 INFO L226 Difference]: Without dead ends: 223 [2022-03-18 01:06:36,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=44102, Invalid=55438, Unknown=0, NotChecked=0, Total=99540 [2022-03-18 01:06:36,723 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:36,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:06:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-18 01:06:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-18 01:06:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-03-18 01:06:36,729 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 219 [2022-03-18 01:06:36,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:36,730 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-03-18 01:06:36,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-03-18 01:06:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-18 01:06:36,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:36,730 INFO L500 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:36,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-18 01:06:36,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,SelfDestructingSolverStorable208,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:36,935 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1390976806, now seen corresponding path program 207 times [2022-03-18 01:06:36,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:36,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472139229] [2022-03-18 01:06:37,146 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:06:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 642835024, now seen corresponding path program 1 times [2022-03-18 01:06:37,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:37,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353271021] [2022-03-18 01:06:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:37,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:37,148 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:06:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:37,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:06:37,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1390976806, now seen corresponding path program 208 times [2022-03-18 01:06:37,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:37,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416340898] [2022-03-18 01:06:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:37,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:40,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416340898] [2022-03-18 01:06:40,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416340898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:06:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497678551] [2022-03-18 01:06:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:06:40,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:40,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:06:40,263 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:06:40,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-18 01:06:40,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:06:40,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:06:40,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-18 01:06:40,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:06:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:40,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:06:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497678551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:06:49,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:06:49,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-03-18 01:06:49,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:49,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472139229] [2022-03-18 01:06:49,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472139229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:49,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:49,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-18 01:06:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813053209] [2022-03-18 01:06:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:49,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-18 01:06:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-18 01:06:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-03-18 01:06:49,625 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:53,547 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-03-18 01:06:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-18 01:06:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-03-18 01:06:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:53,548 INFO L225 Difference]: With dead ends: 232 [2022-03-18 01:06:53,548 INFO L226 Difference]: Without dead ends: 225 [2022-03-18 01:06:53,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=44946, Invalid=56496, Unknown=0, NotChecked=0, Total=101442 [2022-03-18 01:06:53,552 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:53,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 44 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:06:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-18 01:06:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-03-18 01:06:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2022-03-18 01:06:53,557 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 221 [2022-03-18 01:06:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:53,558 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2022-03-18 01:06:53,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:06:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2022-03-18 01:06:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-18 01:06:53,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:53,558 INFO L500 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:53,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-18 01:06:53,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,SelfDestructingSolverStorable210,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:53,759 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1388701373, now seen corresponding path program 209 times [2022-03-18 01:06:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:53,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501833773] [2022-03-18 01:06:53,973 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:06:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 701940368, now seen corresponding path program 1 times [2022-03-18 01:06:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:53,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370179711] [2022-03-18 01:06:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:53,976 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:06:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:06:53,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:06:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1388701373, now seen corresponding path program 210 times [2022-03-18 01:06:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570824978] [2022-03-18 01:06:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:57,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:57,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:57,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570824978] [2022-03-18 01:06:57,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570824978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:06:57,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345551529] [2022-03-18 01:06:57,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:06:57,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:06:57,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:06:57,067 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:06:57,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-18 01:06:57,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:06:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:06:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:06:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:06:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-18 01:06:57,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:06:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-18 01:06:57,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345551529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:06:57,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:06:57,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 4, 4] total 113 [2022-03-18 01:06:57,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:57,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501833773] [2022-03-18 01:06:57,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501833773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:57,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:57,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-18 01:06:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911171605] [2022-03-18 01:06:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:57,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-18 01:06:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-18 01:06:57,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-03-18 01:06:57,696 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:01,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:01,676 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2022-03-18 01:07:01,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-18 01:07:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-03-18 01:07:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:01,677 INFO L225 Difference]: With dead ends: 234 [2022-03-18 01:07:01,677 INFO L226 Difference]: Without dead ends: 227 [2022-03-18 01:07:01,679 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18196, Invalid=29546, Unknown=0, NotChecked=0, Total=47742 [2022-03-18 01:07:01,679 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:01,679 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:07:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-18 01:07:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-18 01:07:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2022-03-18 01:07:01,685 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 223 [2022-03-18 01:07:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:01,685 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2022-03-18 01:07:01,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2022-03-18 01:07:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-18 01:07:01,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:01,686 INFO L500 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:01,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-18 01:07:01,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211,SelfDestructingSolverStorable212 [2022-03-18 01:07:01,895 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1189773280, now seen corresponding path program 211 times [2022-03-18 01:07:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:01,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260886156] [2022-03-18 01:07:02,134 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:07:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 761045712, now seen corresponding path program 1 times [2022-03-18 01:07:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:02,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159371843] [2022-03-18 01:07:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:02,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:02,136 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:07:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:02,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:07:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1189773280, now seen corresponding path program 212 times [2022-03-18 01:07:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:02,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989102151] [2022-03-18 01:07:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:02,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:05,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:05,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989102151] [2022-03-18 01:07:05,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989102151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:07:05,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172435065] [2022-03-18 01:07:05,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:07:05,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:05,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:07:05,280 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:07:05,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-18 01:07:05,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:07:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:07:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-18 01:07:05,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:07:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:05,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:07:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:14,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172435065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:07:14,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:07:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 218 [2022-03-18 01:07:14,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:14,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260886156] [2022-03-18 01:07:14,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260886156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:14,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:14,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-18 01:07:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986784963] [2022-03-18 01:07:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:14,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-18 01:07:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-18 01:07:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23438, Invalid=23868, Unknown=0, NotChecked=0, Total=47306 [2022-03-18 01:07:14,944 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:19,006 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-03-18 01:07:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-18 01:07:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-03-18 01:07:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:19,007 INFO L225 Difference]: With dead ends: 236 [2022-03-18 01:07:19,007 INFO L226 Difference]: Without dead ends: 229 [2022-03-18 01:07:19,010 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=46658, Invalid=58642, Unknown=0, NotChecked=0, Total=105300 [2022-03-18 01:07:19,010 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:19,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 34 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:07:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-18 01:07:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-18 01:07:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2022-03-18 01:07:19,016 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 225 [2022-03-18 01:07:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:19,016 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2022-03-18 01:07:19,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2022-03-18 01:07:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-18 01:07:19,017 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:19,017 INFO L500 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:19,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-18 01:07:19,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214,SelfDestructingSolverStorable213 [2022-03-18 01:07:19,231 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563069, now seen corresponding path program 213 times [2022-03-18 01:07:19,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021601110] [2022-03-18 01:07:19,433 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:07:19,434 INFO L85 PathProgramCache]: Analyzing trace with hash 820151056, now seen corresponding path program 1 times [2022-03-18 01:07:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407852224] [2022-03-18 01:07:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:19,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:19,436 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:07:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:19,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:07:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563069, now seen corresponding path program 214 times [2022-03-18 01:07:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340443883] [2022-03-18 01:07:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:22,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:22,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340443883] [2022-03-18 01:07:22,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340443883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:07:22,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320186144] [2022-03-18 01:07:22,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:07:22,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:22,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:07:22,668 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:07:22,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-18 01:07:22,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:07:22,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:07:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 01:07:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:07:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:23,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:07:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:32,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320186144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:07:32,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:07:32,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-03-18 01:07:32,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021601110] [2022-03-18 01:07:32,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021601110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:32,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:32,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-18 01:07:32,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693824177] [2022-03-18 01:07:32,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:32,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-18 01:07:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-18 01:07:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23873, Invalid=24307, Unknown=0, NotChecked=0, Total=48180 [2022-03-18 01:07:32,586 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:36,781 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-03-18 01:07:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-18 01:07:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-03-18 01:07:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:36,782 INFO L225 Difference]: With dead ends: 238 [2022-03-18 01:07:36,782 INFO L226 Difference]: Without dead ends: 231 [2022-03-18 01:07:36,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=47526, Invalid=59730, Unknown=0, NotChecked=0, Total=107256 [2022-03-18 01:07:36,786 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:36,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:07:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-18 01:07:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-03-18 01:07:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-03-18 01:07:36,792 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2022-03-18 01:07:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:36,792 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-03-18 01:07:36,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-03-18 01:07:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-18 01:07:36,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:36,793 INFO L500 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:36,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-18 01:07:36,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,SelfDestructingSolverStorable216,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:36,993 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1953147878, now seen corresponding path program 215 times [2022-03-18 01:07:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:36,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1461262499] [2022-03-18 01:07:37,225 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:07:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash 879256400, now seen corresponding path program 1 times [2022-03-18 01:07:37,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:37,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625496616] [2022-03-18 01:07:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:37,227 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:07:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:37,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:07:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1953147878, now seen corresponding path program 216 times [2022-03-18 01:07:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:37,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798684534] [2022-03-18 01:07:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:40,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798684534] [2022-03-18 01:07:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798684534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:07:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002293388] [2022-03-18 01:07:40,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:07:40,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:07:40,491 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:07:40,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-18 01:07:40,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:07:40,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:07:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:07:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:07:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-18 01:07:40,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:07:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-18 01:07:41,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002293388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:07:41,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:07:41,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 4, 4] total 116 [2022-03-18 01:07:41,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:41,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1461262499] [2022-03-18 01:07:41,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1461262499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:41,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:41,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-18 01:07:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136016580] [2022-03-18 01:07:41,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:41,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-18 01:07:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-18 01:07:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 01:07:41,127 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:45,289 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2022-03-18 01:07:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-18 01:07:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-03-18 01:07:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:45,290 INFO L225 Difference]: With dead ends: 240 [2022-03-18 01:07:45,290 INFO L226 Difference]: Without dead ends: 233 [2022-03-18 01:07:45,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=19201, Invalid=31199, Unknown=0, NotChecked=0, Total=50400 [2022-03-18 01:07:45,293 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:45,293 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 49 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:07:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-18 01:07:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-18 01:07:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-03-18 01:07:45,299 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 229 [2022-03-18 01:07:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:45,299 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-03-18 01:07:45,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:07:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-03-18 01:07:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-18 01:07:45,300 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:45,300 INFO L500 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:45,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-18 01:07:45,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,SelfDestructingSolverStorable217,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:45,501 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1837982007, now seen corresponding path program 217 times [2022-03-18 01:07:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:45,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1562109505] [2022-03-18 01:07:45,743 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:07:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 938361744, now seen corresponding path program 1 times [2022-03-18 01:07:45,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:45,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822234045] [2022-03-18 01:07:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:45,757 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:07:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:07:45,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:07:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1837982007, now seen corresponding path program 218 times [2022-03-18 01:07:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196744069] [2022-03-18 01:07:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:49,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:49,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196744069] [2022-03-18 01:07:49,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196744069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:07:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644257395] [2022-03-18 01:07:49,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:07:49,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:07:49,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:07:49,097 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:07:49,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-18 01:07:49,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:07:49,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:07:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 01:07:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:07:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:49,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:07:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644257395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:07:59,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:07:59,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 224 [2022-03-18 01:07:59,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:59,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1562109505] [2022-03-18 01:07:59,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1562109505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:59,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:59,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-18 01:07:59,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278184037] [2022-03-18 01:07:59,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:59,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-18 01:07:59,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-18 01:07:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24755, Invalid=25197, Unknown=0, NotChecked=0, Total=49952 [2022-03-18 01:07:59,385 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:03,727 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2022-03-18 01:08:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-18 01:08:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-03-18 01:08:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:03,728 INFO L225 Difference]: With dead ends: 242 [2022-03-18 01:08:03,728 INFO L226 Difference]: Without dead ends: 235 [2022-03-18 01:08:03,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6648 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=49286, Invalid=61936, Unknown=0, NotChecked=0, Total=111222 [2022-03-18 01:08:03,731 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:03,731 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 49 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:08:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-18 01:08:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-03-18 01:08:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2022-03-18 01:08:03,738 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 231 [2022-03-18 01:08:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:03,738 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2022-03-18 01:08:03,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2022-03-18 01:08:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-18 01:08:03,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:03,739 INFO L500 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:03,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-18 01:08:03,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220,SelfDestructingSolverStorable219 [2022-03-18 01:08:03,939 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1313432812, now seen corresponding path program 219 times [2022-03-18 01:08:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:03,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246619363] [2022-03-18 01:08:04,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:08:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash 997467088, now seen corresponding path program 1 times [2022-03-18 01:08:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:04,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452768634] [2022-03-18 01:08:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:04,115 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:08:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:04,116 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:08:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1313432812, now seen corresponding path program 220 times [2022-03-18 01:08:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669205787] [2022-03-18 01:08:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:04,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:07,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:07,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:07,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669205787] [2022-03-18 01:08:07,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669205787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:08:07,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134436752] [2022-03-18 01:08:07,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:08:07,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:08:07,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:08:07,526 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:08:07,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-18 01:08:07,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:08:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:08:07,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-18 01:08:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:08:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:08:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:18,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134436752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:08:18,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:08:18,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-03-18 01:08:18,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246619363] [2022-03-18 01:08:18,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246619363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:18,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:18,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-18 01:08:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645838587] [2022-03-18 01:08:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:18,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-18 01:08:18,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-18 01:08:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25202, Invalid=25648, Unknown=0, NotChecked=0, Total=50850 [2022-03-18 01:08:18,032 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:22,466 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-03-18 01:08:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-18 01:08:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-03-18 01:08:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:22,467 INFO L225 Difference]: With dead ends: 244 [2022-03-18 01:08:22,467 INFO L226 Difference]: Without dead ends: 237 [2022-03-18 01:08:22,471 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=50178, Invalid=63054, Unknown=0, NotChecked=0, Total=113232 [2022-03-18 01:08:22,472 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:22,472 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 49 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:08:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-18 01:08:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-03-18 01:08:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2022-03-18 01:08:22,478 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 233 [2022-03-18 01:08:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:22,478 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2022-03-18 01:08:22,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2022-03-18 01:08:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-03-18 01:08:22,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:22,479 INFO L500 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:22,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-18 01:08:22,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221,SelfDestructingSolverStorable222 [2022-03-18 01:08:22,691 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1871130191, now seen corresponding path program 221 times [2022-03-18 01:08:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:22,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416743726] [2022-03-18 01:08:22,939 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:08:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1056572432, now seen corresponding path program 1 times [2022-03-18 01:08:22,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:22,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660424297] [2022-03-18 01:08:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:22,942 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:08:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:22,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:08:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1871130191, now seen corresponding path program 222 times [2022-03-18 01:08:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089280309] [2022-03-18 01:08:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:26,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089280309] [2022-03-18 01:08:26,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089280309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:08:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030132988] [2022-03-18 01:08:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:08:26,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:08:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:08:26,425 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:08:26,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-18 01:08:26,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:08:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:08:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:08:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:08:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 1 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-18 01:08:26,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:08:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 1 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-18 01:08:27,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030132988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:08:27,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:08:27,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 4, 4] total 119 [2022-03-18 01:08:27,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416743726] [2022-03-18 01:08:27,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416743726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:27,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:27,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-18 01:08:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404386450] [2022-03-18 01:08:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:27,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-18 01:08:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-18 01:08:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-03-18 01:08:27,084 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:31,531 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2022-03-18 01:08:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-18 01:08:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-03-18 01:08:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:31,532 INFO L225 Difference]: With dead ends: 246 [2022-03-18 01:08:31,532 INFO L226 Difference]: Without dead ends: 239 [2022-03-18 01:08:31,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20233, Invalid=32897, Unknown=0, NotChecked=0, Total=53130 [2022-03-18 01:08:31,534 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:31,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 64 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:08:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-18 01:08:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-03-18 01:08:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2022-03-18 01:08:31,541 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 235 [2022-03-18 01:08:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:31,541 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2022-03-18 01:08:31,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2022-03-18 01:08:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-03-18 01:08:31,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:31,542 INFO L500 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:31,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-18 01:08:31,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223,SelfDestructingSolverStorable224 [2022-03-18 01:08:31,743 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash -947399410, now seen corresponding path program 223 times [2022-03-18 01:08:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [963075486] [2022-03-18 01:08:31,946 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:08:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1115677776, now seen corresponding path program 1 times [2022-03-18 01:08:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:31,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076405542] [2022-03-18 01:08:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:31,949 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:08:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:31,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:08:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash -947399410, now seen corresponding path program 224 times [2022-03-18 01:08:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360551237] [2022-03-18 01:08:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:31,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:35,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:35,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360551237] [2022-03-18 01:08:35,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360551237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:08:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474930074] [2022-03-18 01:08:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:08:35,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:08:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:08:35,494 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:08:35,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-18 01:08:35,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:08:35,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:08:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-18 01:08:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:08:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:35,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:08:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:46,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474930074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:08:46,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 01:08:46,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115, 115] total 230 [2022-03-18 01:08:46,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:46,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [963075486] [2022-03-18 01:08:46,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [963075486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:46,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:46,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-18 01:08:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891568980] [2022-03-18 01:08:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:46,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-18 01:08:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-18 01:08:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26108, Invalid=26562, Unknown=0, NotChecked=0, Total=52670 [2022-03-18 01:08:46,262 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:50,810 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-03-18 01:08:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-18 01:08:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-03-18 01:08:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:50,811 INFO L225 Difference]: With dead ends: 248 [2022-03-18 01:08:50,811 INFO L226 Difference]: Without dead ends: 241 [2022-03-18 01:08:50,815 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6999 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=51986, Invalid=65320, Unknown=0, NotChecked=0, Total=117306 [2022-03-18 01:08:50,815 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:50,815 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:08:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-18 01:08:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-18 01:08:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-03-18 01:08:50,831 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2022-03-18 01:08:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:50,831 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-03-18 01:08:50,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:08:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-03-18 01:08:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-18 01:08:50,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:50,832 INFO L500 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:50,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-18 01:08:51,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225,SelfDestructingSolverStorable226 [2022-03-18 01:08:51,032 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1994618155, now seen corresponding path program 225 times [2022-03-18 01:08:51,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:51,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [757023262] [2022-03-18 01:08:51,274 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 01:08:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1174783120, now seen corresponding path program 1 times [2022-03-18 01:08:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917028256] [2022-03-18 01:08:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:51,276 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 01:08:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 01:08:51,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 01:08:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1994618155, now seen corresponding path program 226 times [2022-03-18 01:08:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:51,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641400680] [2022-03-18 01:08:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641400680] [2022-03-18 01:08:54,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641400680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:08:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187527996] [2022-03-18 01:08:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:08:54,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:08:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:08:54,800 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:08:54,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-18 01:08:54,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:08:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:08:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-18 01:08:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:08:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates...