/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/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:47:12,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:47:12,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:47:12,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:47:12,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:47:12,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:47:12,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:47:12,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:47:12,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:47:12,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:47:12,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:47:12,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:47:12,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:47:12,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:47:12,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:47:12,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:47:12,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:47:12,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:47:12,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:47:12,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:47:12,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:47:12,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:47:12,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:47:12,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:47:12,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:47:12,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:47:12,721 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:47:12,721 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:47:12,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:47:12,726 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:47:12,727 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:47:12,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:47:12,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:47:13,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:47:13,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:47:13,003 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:47:13,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2022-03-20 17:47:13,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12af9c89/3b6b5e4c2e8b4e8cae5dc03734926a47/FLAGc4a9cf14a [2022-03-20 17:47:13,468 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:47:13,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2022-03-20 17:47:13,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12af9c89/3b6b5e4c2e8b4e8cae5dc03734926a47/FLAGc4a9cf14a [2022-03-20 17:47:13,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12af9c89/3b6b5e4c2e8b4e8cae5dc03734926a47 [2022-03-20 17:47:13,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:47:13,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:47:13,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:47:13,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:47:13,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:47:13,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:47:13" (1/1) ... [2022-03-20 17:47:13,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c34b72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:13, skipping insertion in model container [2022-03-20 17:47:13,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:47:13" (1/1) ... [2022-03-20 17:47:13,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:47:13,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:47:14,055 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/sum03-1.i[807,820] [2022-03-20 17:47:14,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:47:14,073 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:47:14,083 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/sum03-1.i[807,820] [2022-03-20 17:47:14,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:47:14,097 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:47:14,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14 WrapperNode [2022-03-20 17:47:14,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:47:14,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:47:14,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:47:14,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:47:14,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:47:14,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:47:14,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:47:14,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:47:14,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (1/1) ... [2022-03-20 17:47:14,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:47:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:14,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:47:14,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:47:14,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:47:14,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:47:14,215 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:47:14,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:47:14,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:47:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:47:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:47:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:47:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:47:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:47:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:47:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:47:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 17:47:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:47:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:47:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:47:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:47:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:47:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:47:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:47:14,288 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:47:14,290 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:47:14,405 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:47:14,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:47:14,411 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:47:14,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:47:14 BoogieIcfgContainer [2022-03-20 17:47:14,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:47:14,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:47:14,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:47:14,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:47:14,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:47:13" (1/3) ... [2022-03-20 17:47:14,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e56ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:47:14, skipping insertion in model container [2022-03-20 17:47:14,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:47:14" (2/3) ... [2022-03-20 17:47:14,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e56ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:47:14, skipping insertion in model container [2022-03-20 17:47:14,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:47:14" (3/3) ... [2022-03-20 17:47:14,420 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2022-03-20 17:47:14,425 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:47:14,425 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:47:14,464 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:47:14,472 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:47:14,472 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:47:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 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) [2022-03-20 17:47:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 17:47:14,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:14,500 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:14,500 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1946695220, now seen corresponding path program 1 times [2022-03-20 17:47:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:14,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546229740] [2022-03-20 17:47:14,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:47:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1946695220, now seen corresponding path program 2 times [2022-03-20 17:47:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:14,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981929560] [2022-03-20 17:47:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981929560] [2022-03-20 17:47:14,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981929560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:14,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:14,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:14,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546229740] [2022-03-20 17:47:14,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546229740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:14,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:14,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479814234] [2022-03-20 17:47:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:14,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:47:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:47:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:47:15,004 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 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 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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) [2022-03-20 17:47:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:15,199 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2022-03-20 17:47:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:47:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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 [2022-03-20 17:47:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:15,209 INFO L225 Difference]: With dead ends: 41 [2022-03-20 17:47:15,209 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 17:47:15,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:47:15,215 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:15,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 17:47:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-03-20 17:47:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:47:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-20 17:47:15,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2022-03-20 17:47:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:15,251 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-20 17:47:15,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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) [2022-03-20 17:47:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-20 17:47:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 17:47:15,253 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:15,253 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:15,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:47:15,253 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1052577873, now seen corresponding path program 1 times [2022-03-20 17:47:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:15,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674851373] [2022-03-20 17:47:15,641 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1030477041, now seen corresponding path program 1 times [2022-03-20 17:47:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402556372] [2022-03-20 17:47:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:15,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:16,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:16,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402556372] [2022-03-20 17:47:16,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402556372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:16,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:16,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:47:21,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:21,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674851373] [2022-03-20 17:47:21,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674851373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:21,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:47:21,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958136238] [2022-03-20 17:47:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:21,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:47:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:47:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=189, Unknown=2, NotChecked=0, Total=240 [2022-03-20 17:47:21,887 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:23,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:23,844 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-03-20 17:47:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:47:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.25) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-20 17:47:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:23,845 INFO L225 Difference]: With dead ends: 35 [2022-03-20 17:47:23,846 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 17:47:23,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=92, Invalid=412, Unknown=2, NotChecked=0, Total=506 [2022-03-20 17:47:23,847 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:23,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 64 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-03-20 17:47:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 17:47:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-03-20 17:47:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:47:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 17:47:23,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-20 17:47:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:23,864 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 17:47:23,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.25) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 17:47:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 17:47:23,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:23,866 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:23,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:47:23,866 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1109836175, now seen corresponding path program 1 times [2022-03-20 17:47:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:23,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [932687612] [2022-03-20 17:47:24,116 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2053396079, now seen corresponding path program 1 times [2022-03-20 17:47:24,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:24,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397499914] [2022-03-20 17:47:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:24,163 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:24,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1109836175, now seen corresponding path program 2 times [2022-03-20 17:47:24,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:24,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915162320] [2022-03-20 17:47:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:24,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:24,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915162320] [2022-03-20 17:47:24,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915162320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702337668] [2022-03-20 17:47:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:24,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:24,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:24,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:47:24,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:47:24,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:24,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702337668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:24,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:24,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 17:47:24,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [932687612] [2022-03-20 17:47:24,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [932687612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:24,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:47:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243819467] [2022-03-20 17:47:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:24,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:47:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:47:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:47:24,631 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:24,758 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-20 17:47:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:47:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-20 17:47:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:24,759 INFO L225 Difference]: With dead ends: 43 [2022-03-20 17:47:24,760 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 17:47:24,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:47:24,761 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:24,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 17:47:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 17:47:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:47:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 17:47:24,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2022-03-20 17:47:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:24,779 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 17:47:24,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 17:47:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:47:24,781 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:24,781 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:24,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:24,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:24,992 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 723660460, now seen corresponding path program 3 times [2022-03-20 17:47:24,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122542033] [2022-03-20 17:47:25,298 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1275910481, now seen corresponding path program 1 times [2022-03-20 17:47:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:25,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286111658] [2022-03-20 17:47:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:25,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:25,315 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:25,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash 723660460, now seen corresponding path program 4 times [2022-03-20 17:47:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:25,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388876977] [2022-03-20 17:47:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:25,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:47:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:25,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388876977] [2022-03-20 17:47:25,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388876977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:25,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800454284] [2022-03-20 17:47:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:25,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:25,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:25,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:47:25,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 17:47:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:47:25,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:47:25,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800454284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:25,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:25,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-03-20 17:47:25,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:25,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122542033] [2022-03-20 17:47:25,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122542033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:25,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:25,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:47:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542716987] [2022-03-20 17:47:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:25,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:47:25,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:47:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:47:25,856 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:47:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:26,028 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-03-20 17:47:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:47:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-03-20 17:47:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:26,032 INFO L225 Difference]: With dead ends: 47 [2022-03-20 17:47:26,033 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 17:47:26,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:47:26,034 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:26,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 17:47:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 17:47:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:47:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-20 17:47:26,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2022-03-20 17:47:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:26,050 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-20 17:47:26,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:47:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-20 17:47:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:47:26,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:26,053 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:26,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:26,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 17:47:26,277 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash -668913975, now seen corresponding path program 5 times [2022-03-20 17:47:26,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:26,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1231374275] [2022-03-20 17:47:26,614 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash -310249745, now seen corresponding path program 1 times [2022-03-20 17:47:26,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:26,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048913892] [2022-03-20 17:47:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:26,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:26,644 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:26,654 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -668913975, now seen corresponding path program 6 times [2022-03-20 17:47:26,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:26,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829816348] [2022-03-20 17:47:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:26,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 17:47:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:26,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829816348] [2022-03-20 17:47:26,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829816348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:26,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540648375] [2022-03-20 17:47:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:26,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:26,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:26,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:26,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:47:27,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:47:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 17:47:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:47:28,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:29,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540648375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:29,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:47:29,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2022-03-20 17:47:29,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:29,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1231374275] [2022-03-20 17:47:29,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1231374275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:29,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:29,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583376622] [2022-03-20 17:47:29,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:29,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:47:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:47:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:47:29,412 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:47:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:29,711 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-20 17:47:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:47:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-03-20 17:47:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:29,712 INFO L225 Difference]: With dead ends: 51 [2022-03-20 17:47:29,712 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 17:47:29,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:47:29,714 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:29,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 17:47:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-20 17:47:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 17:47:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-03-20 17:47:29,728 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 37 [2022-03-20 17:47:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:29,728 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-03-20 17:47:29,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:47:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-03-20 17:47:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 17:47:29,729 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:29,729 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:29,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:29,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:29,938 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:29,939 INFO L85 PathProgramCache]: Analyzing trace with hash -505363994, now seen corresponding path program 7 times [2022-03-20 17:47:29,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:29,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1993648958] [2022-03-20 17:47:30,141 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 655410991, now seen corresponding path program 1 times [2022-03-20 17:47:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648470065] [2022-03-20 17:47:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:30,152 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:30,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash -505363994, now seen corresponding path program 8 times [2022-03-20 17:47:30,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497646558] [2022-03-20 17:47:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:30,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:47:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 17:47:30,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497646558] [2022-03-20 17:47:30,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497646558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797333958] [2022-03-20 17:47:30,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:30,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:30,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:30,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:47:30,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 17:47:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 17:47:30,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 17:47:30,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797333958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:30,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:30,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 17:47:30,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1993648958] [2022-03-20 17:47:30,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1993648958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:30,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:30,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594332622] [2022-03-20 17:47:30,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:30,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:47:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:47:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:47:30,881 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:47:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:31,174 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-03-20 17:47:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:47:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-03-20 17:47:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:31,175 INFO L225 Difference]: With dead ends: 55 [2022-03-20 17:47:31,175 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 17:47:31,176 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:47:31,176 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:31,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:47:31,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 17:47:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-20 17:47:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:47:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-03-20 17:47:31,190 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 45 [2022-03-20 17:47:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:31,190 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-03-20 17:47:31,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:47:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-03-20 17:47:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 17:47:31,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:31,192 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:31,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:31,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:31,407 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash -736237565, now seen corresponding path program 9 times [2022-03-20 17:47:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:31,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146342975] [2022-03-20 17:47:31,692 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1621071727, now seen corresponding path program 1 times [2022-03-20 17:47:31,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902597138] [2022-03-20 17:47:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:31,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:31,701 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:31,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash -736237565, now seen corresponding path program 10 times [2022-03-20 17:47:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759317998] [2022-03-20 17:47:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:47:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:47:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 17:47:31,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759317998] [2022-03-20 17:47:31,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759317998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043083446] [2022-03-20 17:47:31,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:31,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:31,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:31,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:31,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:47:31,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:31,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:31,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:47:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 17:47:32,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 17:47:32,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043083446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:32,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:32,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 17:47:32,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:32,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146342975] [2022-03-20 17:47:32,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146342975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:32,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:47:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587035516] [2022-03-20 17:47:32,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:32,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:47:32,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:47:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:47:32,536 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 17:47:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:32,883 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-03-20 17:47:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:47:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-03-20 17:47:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:32,884 INFO L225 Difference]: With dead ends: 59 [2022-03-20 17:47:32,884 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 17:47:32,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:47:32,886 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:32,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:47:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 17:47:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-03-20 17:47:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 9 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 17:47:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-20 17:47:32,900 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 53 [2022-03-20 17:47:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:32,900 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-20 17:47:32,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 17:47:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-20 17:47:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:47:32,901 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:32,901 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:32,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:33,115 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,SelfDestructingSolverStorable10,SelfDestructingSolverStorable11 [2022-03-20 17:47:33,116 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash 764780832, now seen corresponding path program 11 times [2022-03-20 17:47:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:33,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197081660] [2022-03-20 17:47:33,341 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1708234833, now seen corresponding path program 1 times [2022-03-20 17:47:33,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:33,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921425993] [2022-03-20 17:47:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:33,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:33,350 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:33,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash 764780832, now seen corresponding path program 12 times [2022-03-20 17:47:33,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:33,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986477931] [2022-03-20 17:47:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:47:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:47:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 17:47:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 17:47:33,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:33,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986477931] [2022-03-20 17:47:33,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986477931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:33,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162834667] [2022-03-20 17:47:33,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:33,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:33,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:33,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:33,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:47:34,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 17:47:34,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:34,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:47:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 30 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 17:47:35,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:35,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162834667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:35,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 17:47:35,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2022-03-20 17:47:35,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197081660] [2022-03-20 17:47:35,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197081660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:35,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:35,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:47:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393713922] [2022-03-20 17:47:35,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:35,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:47:35,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:47:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:47:35,883 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:47:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:36,313 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-03-20 17:47:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:47:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-03-20 17:47:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:36,314 INFO L225 Difference]: With dead ends: 63 [2022-03-20 17:47:36,314 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 17:47:36,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:47:36,316 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:36,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 35 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:47:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 17:47:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 17:47:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:47:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-20 17:47:36,331 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 61 [2022-03-20 17:47:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:36,332 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-20 17:47:36,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:47:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-20 17:47:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 17:47:36,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:36,333 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:36,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:36,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:36,538 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1610935613, now seen corresponding path program 13 times [2022-03-20 17:47:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [20010845] [2022-03-20 17:47:36,808 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash -742574097, now seen corresponding path program 1 times [2022-03-20 17:47:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:36,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577594955] [2022-03-20 17:47:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:36,815 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:36,823 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1610935613, now seen corresponding path program 14 times [2022-03-20 17:47:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628315946] [2022-03-20 17:47:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:47:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:47:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 17:47:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-20 17:47:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 17:47:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628315946] [2022-03-20 17:47:37,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628315946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929091125] [2022-03-20 17:47:37,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:37,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:37,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:47:37,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:37,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:47:37,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 17:47:37,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 17:47:37,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929091125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:37,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:37,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 17:47:37,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [20010845] [2022-03-20 17:47:37,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [20010845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:37,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:37,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:47:37,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853901411] [2022-03-20 17:47:37,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:37,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:47:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:47:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:47:37,916 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 17:47:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:38,541 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-03-20 17:47:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:47:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-03-20 17:47:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:38,542 INFO L225 Difference]: With dead ends: 67 [2022-03-20 17:47:38,542 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 17:47:38,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:47:38,543 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:38,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 67 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 17:47:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 17:47:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 11 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 17:47:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-03-20 17:47:38,560 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 69 [2022-03-20 17:47:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:38,560 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-03-20 17:47:38,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 17:47:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-03-20 17:47:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 17:47:38,561 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:38,561 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:38,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:38,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:38,772 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash -802632614, now seen corresponding path program 15 times [2022-03-20 17:47:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:38,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1996007526] [2022-03-20 17:47:38,977 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash 223086639, now seen corresponding path program 1 times [2022-03-20 17:47:38,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:38,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109808382] [2022-03-20 17:47:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:38,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:38,986 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:39,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -802632614, now seen corresponding path program 16 times [2022-03-20 17:47:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:39,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547506286] [2022-03-20 17:47:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:47:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:47:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 17:47:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-20 17:47:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 17:47:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 17:47:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547506286] [2022-03-20 17:47:39,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547506286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351852056] [2022-03-20 17:47:39,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:39,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:39,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:47:39,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:39,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 17:47:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 17:47:39,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 17:47:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351852056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:40,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:40,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 17:47:40,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1996007526] [2022-03-20 17:47:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1996007526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:40,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:40,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:47:40,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699728644] [2022-03-20 17:47:40,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:40,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:47:40,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:40,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:47:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:47:40,166 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:47:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:40,830 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-03-20 17:47:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:47:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-03-20 17:47:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:40,832 INFO L225 Difference]: With dead ends: 71 [2022-03-20 17:47:40,832 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 17:47:40,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:47:40,833 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:40,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 59 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 17:47:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-20 17:47:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 17:47:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-03-20 17:47:40,863 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 77 [2022-03-20 17:47:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:40,863 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-03-20 17:47:40,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 17:47:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-03-20 17:47:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:47:40,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:40,867 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:40,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:41,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16,SelfDestructingSolverStorable17 [2022-03-20 17:47:41,081 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash -708952457, now seen corresponding path program 17 times [2022-03-20 17:47:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:41,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310429552] [2022-03-20 17:47:41,244 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:41,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1188747375, now seen corresponding path program 1 times [2022-03-20 17:47:41,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:41,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387253960] [2022-03-20 17:47:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:41,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:41,252 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:41,258 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash -708952457, now seen corresponding path program 18 times [2022-03-20 17:47:41,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:41,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630825298] [2022-03-20 17:47:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:41,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:47:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 17:47:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-20 17:47:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:47:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 17:47:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 17:47:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-20 17:47:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 17:47:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-20 17:47:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 17:47:41,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:41,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630825298] [2022-03-20 17:47:41,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630825298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:41,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425883727] [2022-03-20 17:47:41,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:41,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:41,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:41,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:41,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:47:42,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 17:47:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 17:47:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 17:47:42,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 17:47:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425883727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:42,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:42,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 17:47:42,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:42,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310429552] [2022-03-20 17:47:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310429552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:42,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:42,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:47:42,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291044512] [2022-03-20 17:47:42,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:42,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:47:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:47:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:47:42,971 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 17:47:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:43,645 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-20 17:47:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:47:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-03-20 17:47:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:43,647 INFO L225 Difference]: With dead ends: 75 [2022-03-20 17:47:43,647 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 17:47:43,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:47:43,648 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:43,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 17:47:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-03-20 17:47:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 13 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 17:47:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-20 17:47:43,664 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 85 [2022-03-20 17:47:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:43,665 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-20 17:47:43,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 17:47:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-20 17:47:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 17:47:43,666 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:43,666 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:43,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:43,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:43,871 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1149090924, now seen corresponding path program 19 times [2022-03-20 17:47:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407385623] [2022-03-20 17:47:44,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2140559185, now seen corresponding path program 1 times [2022-03-20 17:47:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:44,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983172066] [2022-03-20 17:47:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:44,085 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:44,091 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1149090924, now seen corresponding path program 20 times [2022-03-20 17:47:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:44,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633049652] [2022-03-20 17:47:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:44,126 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 17:47:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 17:47:44,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 17:47:44,175 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 17:47:44,175 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 17:47:44,178 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:47:44,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,SelfDestructingSolverStorable21 [2022-03-20 17:47:44,183 INFO L719 BasicCegarLoop]: Path program histogram: [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:44,186 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 17:47:44,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:47:44 BoogieIcfgContainer [2022-03-20 17:47:44,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 17:47:44,199 INFO L158 Benchmark]: Toolchain (without parser) took 30323.01ms. Allocated memory was 173.0MB in the beginning and 207.6MB in the end (delta: 34.6MB). Free memory was 124.9MB in the beginning and 175.6MB in the end (delta: -50.6MB). Peak memory consumption was 93.4MB. Max. memory is 8.0GB. [2022-03-20 17:47:44,199 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 173.0MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 17:47:44,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.98ms. Allocated memory is still 173.0MB. Free memory was 124.7MB in the beginning and 152.1MB in the end (delta: -27.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 17:47:44,200 INFO L158 Benchmark]: Boogie Preprocessor took 42.58ms. Allocated memory is still 173.0MB. Free memory was 152.1MB in the beginning and 150.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 17:47:44,200 INFO L158 Benchmark]: RCFGBuilder took 270.09ms. Allocated memory is still 173.0MB. Free memory was 150.6MB in the beginning and 140.7MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 17:47:44,200 INFO L158 Benchmark]: TraceAbstraction took 29785.00ms. Allocated memory was 173.0MB in the beginning and 207.6MB in the end (delta: 34.6MB). Free memory was 140.1MB in the beginning and 175.6MB in the end (delta: -35.5MB). Peak memory consumption was 108.1MB. Max. memory is 8.0GB. [2022-03-20 17:47:44,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 173.0MB. Free memory is still 141.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 218.98ms. Allocated memory is still 173.0MB. Free memory was 124.7MB in the beginning and 152.1MB in the end (delta: -27.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.58ms. Allocated memory is still 173.0MB. Free memory was 152.1MB in the beginning and 150.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 270.09ms. Allocated memory is still 173.0MB. Free memory was 150.6MB in the beginning and 140.7MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 29785.00ms. Allocated memory was 173.0MB in the beginning and 207.6MB in the end (delta: 34.6MB). Free memory was 140.1MB in the beginning and 175.6MB in the end (delta: -35.5MB). Peak memory consumption was 108.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND FALSE !(x<10) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.7s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 303 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 292 mSDsluCounter, 455 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 242 mSDsCounter, 235 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1716 IncrementalHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 235 mSolverCounterUnsat, 213 mSDtfsCounter, 1716 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1181 GetRequests, 939 SyntacticMatches, 9 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=11, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 15 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 17:47:44,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...