/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:56:58,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:56:58,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:56:58,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:56:58,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:56:58,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:56:58,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:56:58,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:56:58,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:56:58,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:56:58,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:56:58,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:56:58,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:56:58,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:56:58,762 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:56:58,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:56:58,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:56:58,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:56:58,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:56:58,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:56:58,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:56:58,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:56:58,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:56:58,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:56:58,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:56:58,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:56:58,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:56:58,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:56:58,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:56:58,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:56:58,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:56:58,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:56:58,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:56:58,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:56:58,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:56:58,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:56:58,767 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:56:58,767 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:56:58,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:56:59,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:56:59,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:56:59,011 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:56:59,011 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:56:59,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-04-05 05:56:59,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/055312783/c568fa11f7db4658aa6de143ed80817e/FLAG5c283515f [2022-04-05 05:56:59,431 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:56:59,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-04-05 05:56:59,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/055312783/c568fa11f7db4658aa6de143ed80817e/FLAG5c283515f [2022-04-05 05:56:59,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/055312783/c568fa11f7db4658aa6de143ed80817e [2022-04-05 05:56:59,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:56:59,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:56:59,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:56:59,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:56:59,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:56:59,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:56:59" (1/1) ... [2022-04-05 05:56:59,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e33b045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:56:59, skipping insertion in model container [2022-04-05 05:56:59,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:56:59" (1/1) ... [2022-04-05 05:56:59,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:56:59,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:57:00,021 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-04-05 05:57:00,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:57:00,044 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:57:00,054 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-04-05 05:57:00,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:57:00,072 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:57:00,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00 WrapperNode [2022-04-05 05:57:00,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:57:00,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:57:00,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:57:00,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:57:00,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:57:00,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:57:00,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:57:00,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:57:00,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:57:00,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:00,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:57:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:57:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:57:00,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:57:00,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:57:00,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:57:00,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:57:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:57:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:57:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:57:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:57:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:57:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:57:00,243 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:57:00,245 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:57:00,363 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:57:00,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:57:00,369 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 05:57:00,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:57:00 BoogieIcfgContainer [2022-04-05 05:57:00,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:57:00,372 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:57:00,372 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:57:00,373 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:57:00,376 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:57:00" (1/1) ... [2022-04-05 05:57:00,377 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:57:00,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:57:00 BasicIcfg [2022-04-05 05:57:00,395 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:57:00,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:57:00,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:57:00,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:57:00,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:56:59" (1/4) ... [2022-04-05 05:57:00,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:57:00, skipping insertion in model container [2022-04-05 05:57:00,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:57:00" (2/4) ... [2022-04-05 05:57:00,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:57:00, skipping insertion in model container [2022-04-05 05:57:00,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:57:00" (3/4) ... [2022-04-05 05:57:00,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:57:00, skipping insertion in model container [2022-04-05 05:57:00,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:57:00" (4/4) ... [2022-04-05 05:57:00,405 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.cqvasr [2022-04-05 05:57:00,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:57:00,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:57:00,461 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:57:00,468 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:57:00,469 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:57:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:57:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:57:00,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:00,499 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:00,500 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-04-05 05:57:00,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:00,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4272363] [2022-04-05 05:57:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:00,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:00,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:57:00,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:00,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4272363] [2022-04-05 05:57:00,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4272363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:57:00,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:57:00,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:57:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454645813] [2022-04-05 05:57:00,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:57:00,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:57:00,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:57:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:57:00,743 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:00,796 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-05 05:57:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:57:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 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 12 [2022-04-05 05:57:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:00,806 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:57:00,806 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 05:57:00,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:57:00,811 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:00,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:57:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 05:57:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 05:57:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-04-05 05:57:00,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-04-05 05:57:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:00,842 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-04-05 05:57:00,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-04-05 05:57:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:57:00,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:00,844 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:00,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:57:00,845 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-04-05 05:57:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:00,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327352030] [2022-04-05 05:57:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:00,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:57:00,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327352030] [2022-04-05 05:57:00,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327352030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:57:00,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:57:00,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:57:00,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609832663] [2022-04-05 05:57:00,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:57:00,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:57:00,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:57:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:57:00,961 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:01,005 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-04-05 05:57:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:57:01,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 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 12 [2022-04-05 05:57:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:01,006 INFO L225 Difference]: With dead ends: 24 [2022-04-05 05:57:01,006 INFO L226 Difference]: Without dead ends: 16 [2022-04-05 05:57:01,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:57:01,008 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:01,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:57:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-05 05:57:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-05 05:57:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-05 05:57:01,012 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-04-05 05:57:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:01,013 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-05 05:57:01,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-05 05:57:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:57:01,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:01,014 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:01,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:57:01,014 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-04-05 05:57:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:01,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288533057] [2022-04-05 05:57:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:57:01,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:01,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288533057] [2022-04-05 05:57:01,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288533057] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:57:01,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:57:01,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:57:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826369864] [2022-04-05 05:57:01,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:57:01,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:57:01,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:57:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:57:01,071 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:01,097 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-05 05:57:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:57:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-05 05:57:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:01,098 INFO L225 Difference]: With dead ends: 22 [2022-04-05 05:57:01,098 INFO L226 Difference]: Without dead ends: 17 [2022-04-05 05:57:01,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:57:01,099 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:01,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:57:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-05 05:57:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-05 05:57:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-05 05:57:01,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-04-05 05:57:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:01,104 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-05 05:57:01,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-05 05:57:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 05:57:01,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:01,105 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:01,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 05:57:01,106 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-04-05 05:57:01,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:01,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805048744] [2022-04-05 05:57:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:57:01,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805048744] [2022-04-05 05:57:01,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805048744] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:01,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623838116] [2022-04-05 05:57:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:01,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:01,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:01,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:57:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 05:57:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:57:01,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:57:01,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623838116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:01,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:01,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 05:57:01,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135024667] [2022-04-05 05:57:01,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:01,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:57:01,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:01,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:57:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:57:01,419 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:01,526 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-04-05 05:57:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:57:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 05:57:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:01,527 INFO L225 Difference]: With dead ends: 31 [2022-04-05 05:57:01,527 INFO L226 Difference]: Without dead ends: 22 [2022-04-05 05:57:01,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:57:01,529 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:01,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:57:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-05 05:57:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-05 05:57:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-05 05:57:01,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-04-05 05:57:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:01,535 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-05 05:57:01,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-05 05:57:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 05:57:01,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:01,536 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:01,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:01,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:01,756 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1507884679, now seen corresponding path program 1 times [2022-04-05 05:57:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:01,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412262657] [2022-04-05 05:57:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412262657] [2022-04-05 05:57:01,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412262657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706845263] [2022-04-05 05:57:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:01,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:01,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:01,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:57:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 05:57:01,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:01,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:02,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706845263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:02,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:02,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-05 05:57:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917246699] [2022-04-05 05:57:02,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:02,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 05:57:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 05:57:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-05 05:57:02,041 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:02,153 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-04-05 05:57:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 05:57:02,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-05 05:57:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:02,156 INFO L225 Difference]: With dead ends: 42 [2022-04-05 05:57:02,156 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 05:57:02,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:57:02,164 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:02,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:57:02,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 05:57:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-05 05:57:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-05 05:57:02,173 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-04-05 05:57:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:02,174 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-05 05:57:02,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-05 05:57:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 05:57:02,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:02,175 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:02,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:02,375 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 [2022-04-05 05:57:02,376 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 163921129, now seen corresponding path program 2 times [2022-04-05 05:57:02,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:02,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179708865] [2022-04-05 05:57:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:02,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179708865] [2022-04-05 05:57:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179708865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870762494] [2022-04-05 05:57:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:57:02,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:02,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:02,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:57:02,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:57:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:57:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:57:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:02,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:02,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870762494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:02,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:02,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-05 05:57:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292063575] [2022-04-05 05:57:02,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:02,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 05:57:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 05:57:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:57:02,771 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:02,961 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-04-05 05:57:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 05:57:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-05 05:57:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:02,964 INFO L225 Difference]: With dead ends: 58 [2022-04-05 05:57:02,965 INFO L226 Difference]: Without dead ends: 46 [2022-04-05 05:57:02,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:57:02,969 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:02,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:57:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-05 05:57:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-05 05:57:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-04-05 05:57:02,984 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-04-05 05:57:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:02,985 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-04-05 05:57:02,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-04-05 05:57:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 05:57:02,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:02,986 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:03,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:03,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:03,204 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1399757879, now seen corresponding path program 3 times [2022-04-05 05:57:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:03,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117605255] [2022-04-05 05:57:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:03,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:03,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:57:03,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:03,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117605255] [2022-04-05 05:57:03,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117605255] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:03,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490820553] [2022-04-05 05:57:03,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:57:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:03,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:03,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:57:03,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 05:57:03,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:57:03,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 05:57:03,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-05 05:57:03,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-05 05:57:03,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490820553] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:03,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:03,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-04-05 05:57:03,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69799083] [2022-04-05 05:57:03,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:03,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 05:57:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 05:57:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-04-05 05:57:03,794 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:04,228 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-04-05 05:57:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 05:57:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-05 05:57:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:04,229 INFO L225 Difference]: With dead ends: 70 [2022-04-05 05:57:04,229 INFO L226 Difference]: Without dead ends: 58 [2022-04-05 05:57:04,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 05:57:04,231 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:04,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 37 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:57:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-05 05:57:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-04-05 05:57:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-04-05 05:57:04,240 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-04-05 05:57:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:04,240 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-04-05 05:57:04,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-04-05 05:57:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 05:57:04,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:04,241 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:04,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:04,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:04,459 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 764299557, now seen corresponding path program 4 times [2022-04-05 05:57:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:04,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782642204] [2022-04-05 05:57:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:04,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782642204] [2022-04-05 05:57:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782642204] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421836080] [2022-04-05 05:57:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:57:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:04,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:04,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:57:04,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:57:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:57:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 05:57:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:04,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:05,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421836080] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:05,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:05,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-05 05:57:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429996956] [2022-04-05 05:57:05,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:05,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 05:57:05,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 05:57:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 05:57:05,193 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:05,794 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-04-05 05:57:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 05:57:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-05 05:57:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:05,795 INFO L225 Difference]: With dead ends: 102 [2022-04-05 05:57:05,796 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 05:57:05,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 05:57:05,798 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:05,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:57:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 05:57:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-05 05:57:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-04-05 05:57:05,809 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 51 [2022-04-05 05:57:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:05,809 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-04-05 05:57:05,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-04-05 05:57:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-05 05:57:05,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:05,816 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:05,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:06,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:06,017 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1994074303, now seen corresponding path program 5 times [2022-04-05 05:57:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:06,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744736448] [2022-04-05 05:57:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:06,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:06,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744736448] [2022-04-05 05:57:06,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744736448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419166728] [2022-04-05 05:57:06,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:57:06,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:06,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:06,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:06,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:57:06,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-04-05 05:57:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:57:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 05:57:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:06,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:08,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419166728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:08,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:08,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-05 05:57:08,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188744053] [2022-04-05 05:57:08,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:08,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-05 05:57:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-05 05:57:08,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 05:57:08,096 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:09,903 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2022-04-05 05:57:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 05:57:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-05 05:57:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:09,904 INFO L225 Difference]: With dead ends: 170 [2022-04-05 05:57:09,905 INFO L226 Difference]: Without dead ends: 154 [2022-04-05 05:57:09,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-04-05 05:57:09,910 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:09,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 46 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:57:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-05 05:57:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-05 05:57:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-04-05 05:57:09,925 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 85 [2022-04-05 05:57:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:09,925 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-04-05 05:57:09,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-04-05 05:57:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-05 05:57:09,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:09,928 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:09,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:10,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:10,145 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1939333511, now seen corresponding path program 6 times [2022-04-05 05:57:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:10,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894984262] [2022-04-05 05:57:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:11,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:57:11,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:11,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894984262] [2022-04-05 05:57:11,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894984262] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:11,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700533971] [2022-04-05 05:57:11,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:57:11,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:11,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:11,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:11,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:57:11,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 05:57:11,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:57:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 05:57:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-04-05 05:57:12,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-04-05 05:57:12,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700533971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:12,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:12,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 8, 8] total 82 [2022-04-05 05:57:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719608731] [2022-04-05 05:57:12,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:12,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-05 05:57:12,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-05 05:57:12,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2438, Invalid=4204, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 05:57:12,873 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:15,627 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2022-04-05 05:57:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-05 05:57:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-05 05:57:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:15,629 INFO L225 Difference]: With dead ends: 185 [2022-04-05 05:57:15,629 INFO L226 Difference]: Without dead ends: 169 [2022-04-05 05:57:15,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8648, Invalid=17112, Unknown=0, NotChecked=0, Total=25760 [2022-04-05 05:57:15,635 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:15,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 53 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:57:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-05 05:57:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2022-04-05 05:57:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-04-05 05:57:15,649 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 153 [2022-04-05 05:57:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:15,649 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-04-05 05:57:15,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-04-05 05:57:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-04-05 05:57:15,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:15,652 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:15,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:15,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:15,860 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash -418093259, now seen corresponding path program 7 times [2022-04-05 05:57:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134943970] [2022-04-05 05:57:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:57:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134943970] [2022-04-05 05:57:17,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134943970] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030570493] [2022-04-05 05:57:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:57:17,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:17,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:17,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 05:57:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 05:57:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:57:17,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:57:22,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030570493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:22,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:22,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-05 05:57:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366033433] [2022-04-05 05:57:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:22,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-05 05:57:22,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-05 05:57:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 05:57:22,120 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:57:28,336 INFO L93 Difference]: Finished difference Result 324 states and 399 transitions. [2022-04-05 05:57:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-05 05:57:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-04-05 05:57:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:57:28,339 INFO L225 Difference]: With dead ends: 324 [2022-04-05 05:57:28,339 INFO L226 Difference]: Without dead ends: 301 [2022-04-05 05:57:28,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-04-05 05:57:28,345 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:57:28,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 56 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 05:57:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-04-05 05:57:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-04-05 05:57:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0135135135135136) internal successors, (300), 296 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2022-04-05 05:57:28,368 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 162 [2022-04-05 05:57:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:57:28,369 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2022-04-05 05:57:28,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:57:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2022-04-05 05:57:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-04-05 05:57:28,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:57:28,373 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:57:28,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 05:57:28,595 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,SelfDestructingSolverStorable10 [2022-04-05 05:57:28,596 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:57:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:57:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -797568279, now seen corresponding path program 8 times [2022-04-05 05:57:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:57:28,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075288104] [2022-04-05 05:57:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:57:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:57:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:57:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:57:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:57:34,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:57:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075288104] [2022-04-05 05:57:34,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075288104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:57:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20238939] [2022-04-05 05:57:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:57:34,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:57:34,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:57:34,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:57:34,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 05:57:34,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:57:34,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:57:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-05 05:57:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:57:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:57:34,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:57:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:57:51,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20238939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:57:51,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:57:51,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-04-05 05:57:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266282929] [2022-04-05 05:57:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:57:51,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-04-05 05:57:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:57:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-04-05 05:57:51,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-04-05 05:57:51,167 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:58:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:58:14,223 INFO L93 Difference]: Finished difference Result 600 states and 744 transitions. [2022-04-05 05:58:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-04-05 05:58:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-04-05 05:58:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:58:14,227 INFO L225 Difference]: With dead ends: 600 [2022-04-05 05:58:14,227 INFO L226 Difference]: Without dead ends: 577 [2022-04-05 05:58:14,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-04-05 05:58:14,244 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:58:14,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 71 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 05:58:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-04-05 05:58:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-04-05 05:58:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 572 states have (on average 1.006993006993007) internal successors, (576), 572 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:58:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 580 transitions. [2022-04-05 05:58:14,280 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 580 transitions. Word has length 300 [2022-04-05 05:58:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:58:14,281 INFO L478 AbstractCegarLoop]: Abstraction has 577 states and 580 transitions. [2022-04-05 05:58:14,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:58:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 580 transitions. [2022-04-05 05:58:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-04-05 05:58:14,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:58:14,291 INFO L499 BasicCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:58:14,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 05:58:14,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:58:14,504 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:58:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:58:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash -617040047, now seen corresponding path program 9 times [2022-04-05 05:58:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:58:14,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594250147] [2022-04-05 05:58:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:58:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:58:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:58:36,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:58:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:58:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:58:36,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:58:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594250147] [2022-04-05 05:58:36,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594250147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:58:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653565723] [2022-04-05 05:58:36,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:58:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:58:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:58:36,082 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:58:36,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 05:58:36,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 05:58:36,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:58:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 05:58:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:58:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2022-04-05 05:58:37,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:58:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2022-04-05 05:58:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653565723] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:58:38,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:58:38,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 5, 5] total 284 [2022-04-05 05:58:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638328695] [2022-04-05 05:58:38,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:58:38,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 284 states [2022-04-05 05:58:38,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:58:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 284 interpolants. [2022-04-05 05:58:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39905, Invalid=40467, Unknown=0, NotChecked=0, Total=80372 [2022-04-05 05:58:38,260 INFO L87 Difference]: Start difference. First operand 577 states and 580 transitions. Second operand has 284 states, 284 states have (on average 2.0316901408450705) internal successors, (577), 283 states have internal predecessors, (577), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:05,379 INFO L93 Difference]: Finished difference Result 610 states and 625 transitions. [2022-04-05 05:59:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2022-04-05 05:59:05,380 INFO L78 Accepts]: Start accepts. Automaton has has 284 states, 284 states have (on average 2.0316901408450705) internal successors, (577), 283 states have internal predecessors, (577), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 576 [2022-04-05 05:59:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:05,383 INFO L225 Difference]: With dead ends: 610 [2022-04-05 05:59:05,383 INFO L226 Difference]: Without dead ends: 587 [2022-04-05 05:59:05,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1716 GetRequests, 1153 SyntacticMatches, 0 SemanticMatches, 563 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39615 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=119709, Invalid=198951, Unknown=0, NotChecked=0, Total=318660 [2022-04-05 05:59:05,399 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 848 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 1143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1143 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:05,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 35 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1143 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:59:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-04-05 05:59:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-04-05 05:59:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 582 states have (on average 1.013745704467354) internal successors, (590), 582 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 594 transitions. [2022-04-05 05:59:05,462 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 594 transitions. Word has length 576 [2022-04-05 05:59:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:05,463 INFO L478 AbstractCegarLoop]: Abstraction has 587 states and 594 transitions. [2022-04-05 05:59:05,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 284 states, 284 states have (on average 2.0316901408450705) internal successors, (577), 283 states have internal predecessors, (577), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 594 transitions. [2022-04-05 05:59:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-04-05 05:59:05,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:05,473 INFO L499 BasicCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:05,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:05,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 05:59:05,683 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 322036361, now seen corresponding path program 10 times [2022-04-05 05:59:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658590313] [2022-04-05 05:59:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-05 05:59:27,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:27,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658590313] [2022-04-05 05:59:27,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658590313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:27,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638717086] [2022-04-05 05:59:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:59:27,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:27,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:27,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:27,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 05:59:27,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:59:27,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 277 conjunts are in the unsatisfiable core [2022-04-05 05:59:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-05 05:59:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-05 06:00:38,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638717086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:38,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:38,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-04-05 06:00:38,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616712010] [2022-04-05 06:00:38,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:38,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-04-05 06:00:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-04-05 06:00:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-04-05 06:00:38,746 INFO L87 Difference]: Start difference. First operand 587 states and 594 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:02:39,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:02:39,667 INFO L93 Difference]: Finished difference Result 1172 states and 1463 transitions. [2022-04-05 06:02:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-04-05 06:02:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2022-04-05 06:02:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:02:39,677 INFO L225 Difference]: With dead ends: 1172 [2022-04-05 06:02:39,677 INFO L226 Difference]: Without dead ends: 1141 [2022-04-05 06:02:39,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2003 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 198.9s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-04-05 06:02:39,770 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:02:39,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 46 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-05 06:02:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-04-05 06:02:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1141. [2022-04-05 06:02:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1136 states have (on average 1.0070422535211268) internal successors, (1144), 1136 states have internal predecessors, (1144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:02:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1148 transitions. [2022-04-05 06:02:39,837 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1148 transitions. Word has length 586 [2022-04-05 06:02:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:02:39,838 INFO L478 AbstractCegarLoop]: Abstraction has 1141 states and 1148 transitions. [2022-04-05 06:02:39,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:02:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1148 transitions. [2022-04-05 06:02:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2022-04-05 06:02:39,849 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:02:39,850 INFO L499 BasicCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:02:39,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 06:02:40,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 06:02:40,072 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:02:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:02:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -661930115, now seen corresponding path program 11 times [2022-04-05 06:02:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:02:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088896889] [2022-04-05 06:02:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:02:40,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:02:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:04:27,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:04:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:04:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-05 06:04:27,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:04:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088896889] [2022-04-05 06:04:27,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088896889] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:04:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138847796] [2022-04-05 06:04:27,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:04:27,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:04:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:04:27,767 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:04:27,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 06:04:29,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 559 check-sat command(s) [2022-04-05 06:04:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:04:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 554 conjunts are in the unsatisfiable core [2022-04-05 06:04:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:04:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-05 06:04:31,761 INFO L328 TraceCheckSpWp]: Computing backward predicates...